Mental Health Act 1983

Type Public General Act
Publication 1983-05-09
Last updated 2026-04-06
State In force
Department Statute Law Database
articles Not indexed
Reform history JSON API
1052

Word in s. 134(1) inserted (1.7.2012) by Health and Social Care Act 2012 (c. 7) , ss. 44(1)(a) , 306(4) (with s. 44(2) ); S.I. 2012/1319 , art. 2(3)

1053

Words in s. 134(1) omitted (1.7.2012) by virtue of Health and Social Care Act 2012 (c. 7) , ss. 44(1)(b) , 306(4) (with s. 44(2) ); S.I. 2012/1319 , art. 2(3)

1054

Words in s. 138(4)(a) omitted (1.7.2012) by virtue of Health and Social Care Act 2012 (c. 7), ss. 42(3), 306(4) (with s. 42(5)); S.I. 2012/1319, art. 2(3)

1055

Words in Sch. 1 Pt. 1 para. 1 omitted (1.7.2012) by virtue of Health and Social Care Act 2012 (c. 7), s. 39(3)(a); S.I. 2012/1319, art. 2(3)

1056

Words in Sch. 1 Pt. 2 para. 1 omitted (1.7.2012) by virtue of Health and Social Care Act 2012 (c. 7), s. 39(3)(b); S.I. 2012/1319, art. 2(3) Words in Sch. 1 Pt. 2 para. 1 omitted (1.7.2012) by virtue of Health and Social Care Act 2012 (c. 7), s. 39(3)(b); S.I. 2012/1319, art. 2(3)

1059
1061
1062

Words in s. 114A(5) omitted (1.8.2012) by virtue of Health and Social Care Act 2012 (c. 7), ss. 217(7), 306(4); S.I. 2012/1319, art. 2(4)

1063

Words in s. 134(3A)(b)(ii) substituted (27.3.2012 for specified purposes, otherwise 1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 185(3), 306(1)(d), (4); S.I 2013/106, art. 2 (with arts. 7-9)

1064

Words in s. 117(2) omitted (27.3.2012 for specified purposes, 1.2.2013 for specified purposes, 1.4.2013 in so far as not already in force) by virtue of Health and Social Care Act 2012 (c. 7), ss. 40(2)(b), 306(1)(4); S.I. 2012/2657, art. 2(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1065

S. 117(2D)-(2G) inserted (27.3.2012 for specified purposes, 1.2.2013 for specified purposes, 1.4.2013 in so far as not already in force) by Health and Social Care Act 2012 (c. 7), ss. 40(3), 306(1)(d), (4); S.I. 2012/2657, art. 2(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1066

Words in s. 117(3) omitted (27.3.2012 for specified purposes, 1.2.2013 for specified purposes, 1.4.2013 in so far as not already in force) by virtue of Health and Social Care Act 2012 (c. 7), ss. 40(4)(b), 306(1)(d), (4); S.I. 2012/2657, art. 2(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1067

Words in s. 117(3) inserted (27.3.2012 for specified purposes, 1.2.2013 for specified purposes, 1.4.2013 in so far as not already in force) by Health and Social Care Act 2012 (c. 7), ss. 40(4)(c), 306(1)(d), (4); S.I. 2012/2657, art. 2(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1069

Words in s. 139(4) inserted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 38(3), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1070
1072
1073
1074

Words in s. 19(3) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 25(b); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1075
1076

Words in s. 23(5)(a) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 26(b); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1077

Word in s. 23(5)(a) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 26(c); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1080

Words in s. 39(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 28(2)(a); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1084

Words in s. 122(2) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), ss. 41(3)(a), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1085

Words in s. 122(2) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(3)(b), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1086

Words in s. 122(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(2)(a), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1087

Words in s. 122(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(2)(b), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1088

Words in s. 122(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(2)(c), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1089

Words in s. 122(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(2)(d), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1090

Words in s. 122(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 41(2)(e), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1091

Words in s. 130A(1) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 43(1)(a), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1092

Words in s. 130A(1) inserted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 43(1)(b), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1093

Words in s. 130A(4) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 43(2), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1094
1095

Words in s. 134(3)(e) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7) , s. 306(4) , Sch. 5 para. 29(b) ; S.I. 2013/160 , art. 2(2) (with arts. 7-9 )

1096

Words in s. 134(3)(e) substituted (1.4.2013) by Health and Social Care Act 2012 (c. 7) , s. 306(4) , Sch. 5 para. 29(c) ; S.I. 2013/160 , art. 2(2) (with arts. 7-9 )

1097

Words in s. 134(3)(e) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7) , s. 306(4) , Sch. 5 para. 29(d) ; S.I. 2013/160 , art. 2(2) (with arts. 7-9 )

1098
1099

Words in s. 140 omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), ss. 45(1)(b), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1100
1101

Words in s. 140 omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), ss. 45(1)(d), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1102
1103

Words in s. 140 omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), ss. 45(1)(f), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1104

Words in definition of "approved clinician" in s. 145(1) inserted (1.4.2013) by Health and Social Care Act 2012 (c. 7), ss. 38(4), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1105

Words in definition of "the managers" in s. 145(1) inserted (1.4.2013) by Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(a)(i); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1106

Words in definition of "the managers" in s. 145(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(a)(ii); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1107

Words in definition of "the managers" in s. 145(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(a)(iii); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1108

Words in definition of "the managers" in s. 145(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(b); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1109

Definition "Primary Care Trust" in s. 145(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(c); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1110

Definition "Strategic Health Authority" in s. 145(1) omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), s. 306(4), Sch. 5 para. 31(1)(d); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1111

Word in s. 146 omitted (1.4.2013) by virtue of Health and Social Care Act 2012 (c. 7), ss. 41(4), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1112
1113

Words in definition of "mental disorder" in s. 145(1) substituted (28.4.2013) by Mental Health (Discrimination) Act 2013 (c. 8), s. 4(1), Sch. para. 1(1)

1114

Word in s. 146 omitted (28.4.2013) by virtue of Mental Health (Discrimination) Act 2013 (c. 8), s. 4(1), Sch. para. 1(2)

1115

Word in s. 147 omitted (28.4.2013) by virtue of Mental Health (Discrimination) Act 2013 (c. 8), s. 4(1), Sch. para. 1(3)

1116

S. 43(4) substituted (18.6.2012 for specified purposes, 5.11.2012 for specified purposes; 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 para. 55(2); S.I. 2012/1320, art. 4(1)(c)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(2)(3) (with arts. 3, 4)

1117

Word in s. 52(2) substituted (9.5.2005 for specified purposes, 18.6.2012 for specified purposes, 5.11.2012 for specified purposes, 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 para. 55(3)(a); S.I. 2005/1267, art. 2(1)(2)(a), Sch. Pt. 1; S.I. 2012/1320, art. 4(1)(c)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3)(c), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(2)(3) (with arts. 3, 4)

1118

Word in s. 52(5) substituted (9.5.2005 for specified purposes, 18.6.2012 for specified purposes, 5.11.2012 for specified purposes, 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 para. 55(3)(b); S.I. 2005/1267, art. 2(1)(2)(a), Sch. Pt. 1; S.I. 2012/1320, art. 4(1)(c)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3)(c), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(2)(3) (with arts. 3, 4)

1119

Word in s. 52(6) substituted (9.5.2005 for specified purposes, 18.6.2012 for specified purposes, 5.11.2012 for specified purposes, 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 para. 55(3)(c); S.I. 2005/1267, art. 2(1)(2)(a), Sch. Pt. 1; S.I. 2012/1320, art. 4(1)(c)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3)(c), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(2)(3) (with arts. 3, 4)

1120

Words in s. 52(7) substituted (9.5.2005 for specified purposes, 18.6.2012 for specified purposes, 5.11.2012 for specified purposes, 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 para. 55(3)(d); S.I. 2005/1267, art. 2(1)(2)(a), Sch. Pt. 1; S.I. 2012/1320, art. 4(1)(c)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3)(c), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(2)(3) (with arts. 3, 4)

1121

Words in s. 52(7)(b) repealed (9.5.2005 for specified purposes, 18.6.2012 for specified purposes, 5.11.2012 for specified purposes, 28.5.2013 for specified purposes) by Criminal Justice Act 2003 (c. 44), s. 336(3)(4), Sch. 3 paras. 55(3)(d), 37 Pt. 4; S.I. 2005/1267, art. 2(1)(2)(a), Sch. Pt. 1; S.I. 2012/1320, art. 4(1)(c)(d)(2)(3) (with art. 5) (see S.I. 2012/2574, art. 4(2) and S.I. 2013/1103, art. 4); S.I. 2012/2574, art. 2(2)(3)(c)(d), Sch. (with arts. 3, 4) (as amended (4.11.2012) by S.I. 2012/2761, art. 2) (with S.I. 2013/1103, art. 4); S.I. 2013/1103, art. 2(1)(c)(d)(2)(3) (with arts. 3, 4)

1123

Words in s. 28(1)(b) substituted (22.4.2014) by Children and Families Act 2014 (c. 6), s. 139(6), Sch. 2 para. 46(a)(i); S.I. 2014/889, art. 4(f) (with transitional provisions in S.I. 2014/1042, arts. 3, 4, 6-10)

1124

Words in s. 28(1)(b) substituted (22.4.2014) by Children and Families Act 2014 (c. 6), s. 139(6), Sch. 2 para. 46(a)(ii); S.I. 2014/889, art. 4(f) (with transitional provisions in S.I. 2014/1042, arts. 3, 4, 6-10)

1125

Words in s. 28(1) substituted (22.4.2014) by Children and Families Act 2014 (c. 6), s. 139(6), Sch. 2 para. 46(b); S.I. 2014/889, art. 4(f) (with transitional provisions in S.I. 2014/1042, arts. 3, 4, 6-10)

1126

Words in s. 31 substituted (22.4.2014) by Crime and Courts Act 2013 (c. 22), s. 61(3), Sch. 9 para. 52; S.I. 2014/954, art. 2(c) (with art. 3) (with transitional provisions and savings in S.I. 2014/956, arts. 3-11)

1127

Words in s. 31 substituted (22.4.2014) by Crime and Courts Act 2013 (c. 22), s. 61(3), Sch. 9 para. 112; S.I. 2014/954, art. 2(c) (with art. 3) (with transitional provisions and savings in S.I. 2014/956, arts. 3-11)

1129

S. 117A inserted (1.10.2014 for specified purposes, otherwise 1.4.2015) by Care Act 2014 (c. 23), ss. 75(6), 127(1); S.I. 2014/2473, art. 2(1)(u); S.I. 2015/993, art. 7(1)(b) (with transitional provisions in S.I. 2015/995)

1131

S. 117(4)(5) inserted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(4), 127(1) (with s. 75(12)); S.I. 2015/993, art. 7(1)(a) (with art. 7(2)) (with transitional provisions in S.I. 2015/995)

1132

S. 117(6) inserted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(5), 127(1); S.I. 2015/993, art. 7(1)(a) (with transitional provisions in S.I. 2015/995)

1133

Words in s. 117(2) inserted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(1), 127(1); S.I. 2015/993, art. 7(1)(a) (with transitional provisions in S.I. 2015/995)

1134

S. 117(3)(a)-(c) inserted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(3), 127(1) (with s. 75(12)); S.I. 2015/993, art. 7(1)(a) (with transitional provisions in S.I. 2015/995)

1135

Words in s. 117(2D) substituted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(2), 127(1); S.I. 2015/993, art. 7(1)(a) (with transitional provisions in S.I. 2015/995)

1136

Words in s. 117(2C)(b) inserted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(11)(b), 127(1); S.I. 2015/993, art. 7(3) (with transitional provisions in S.I. 2015/995)

1138

Definition "local social services authority" in s. 145(1) substituted (1.4.2015) by Care Act 2014 (c. 23), ss. 75(13), 127(1); S.I. 2015/993, art. 7(1)(a) (with art. 7(5)) (with transitional provisions in S.I. 2015/995)

1139

Words in s. 117(2C)(a) substituted (1.4.2015 for specified purposes, otherwise 6.4.2016) by Care Act 2014 (c. 23), ss. 75(11)(a), 127(1); S.I. 2015/993, art. 7(3) (with art. 7(4)) (with transitional provisions in S.I. 2015/995); S.I. 2016/464, art. 2(d)

1142

S. 122 ceases to apply to Scotland (1.4.2013) by virtue of the amendment of s. 146 by Health and Social Care Act 2012 (c. 7), ss. 41(4), 306(4); S.I. 2013/160, art. 2(2) (with arts. 7-9)

1143

S. 80(2)-(5) repealed (S.) (27.9.2005) by The Mental Health (Care and Treatment) (Scotland) Act 2003 (Modification of Enactments) Order 2005 (S.S.I. 2005/465), art. 3, Sch. 2 and repealed (E.W.) (5.10.2005) by The Mental Health (Care and Treatment) (Scotland) Act 2003 (Consequential Provisions) Order 2005, art. 1(1), Sch. 3

1148

Words in s. 130H(7)(b) substituted (3.4.2017) by Regulation and Inspection of Social Care (Wales) Act 2016 (anaw 2), s. 188(1), Sch. 3 para. 39 (as amended by S.I. 2016/1030, regs. 1, 144(2) (with reg. 155)); S.I. 2017/309, art. 2(j) (with arts. 3, 4 Sch.)

1149

Sch. 2 para. 5(1A) inserted (coming into force in accordance with reg. 2(1) of the commencing S.I.) by Wales Act 2017 (c. 4), ss. 62(3)(a), 71(4) (with Sch. 7 paras. 1, 6, 9); S.I. 2017/351, reg. 2(2) [Editorial note: S.I. 2017/1282 was made under 2017 c. 4, Sch. 5 para. 7(1) and comes into force on 12.12.2017]

1150

Words in Sch. 2 para. 5(3) inserted (coming into force in accordance with reg. 2(1) of the commencing S.I.) by Wales Act 2017 (c. 4), ss. 62(3)(b), 71(4) (with Sch. 7 paras. 1, 6); S.I. 2017/351, reg. 2(2) [Editorial note: S.I. 2017/1282 was made under 2017 c. 4, Sch. 5 para. 7(1) and comes into force on 12.12.2017]

Reading this document does not replace reading the official text published on legislation.gov.uk. Contains public sector information licensed under the Open Government Licence v3.0. We assume no responsibility for any inaccuracies arising from the conversion of the original CLML XML to this format.

This text is published under legislation.gov.uk's own terms of reuse, not a Legalize or public-domain licence. legislation.gov.uk
Open Government Licence v3.0 (attribution required)
© Crown and database right. Derived from content available under the Open Government Licence v3.0 from legislation.gov.uk.