10 Highest swings in 1951                    10 Lowest swings in 1951
1.Perth/Kinross, Kinross/W Perth  +7.79  1.Hammersmith, North           -11.76
2.I'ness/R & C, Inverness         +7.71  2.Pembrokeshire                 -8.29
3.Northants, Wellingborough       +6.93  3.Shoreditch and Finsbury       -5.27
4.Angus/Kincardine, S Angus       +6.79  4.Gateshead, East               -5.10
5.Darlington                      +6.58  5.Fife, West                    -4.56
6.Middlesbrough, West             +6.33  6.Essex, Thurrock               -4.52
7.Halifax                         +6.27  7.Belfast, North                -3.71
8.Norwich, North                  +5.10  8.Glasgow, Central              -3.50
9.Leicestershire, Bosworth        +5.08  9.Glasgow, Pollok               -3.32
10.Banffshire                     +4.94  10.Lincolnshire, Grantham       -2.82

10 Highest swings in 1955                    10 Lowest swings in 1955
1.Belfast, North                  +6.84  1.Anglesey                      -9.16
2.Newcastle-upon-Tyne, North      +6.43  2.Edinburgh, Leith              -8.44
3.Middlesbrough, West             +6.21  3.Suffolk, Eye                  -7.73
4.Caithness and Sutherland        +6.19  4.Breconshire and Radnorshire   -6.15
5.Glamorganshire, Barry           +6.14  5.Edinburgh, South              -5.06
6.Coventry, North                 +6.12  6.I'ness/R & C, Inverness       -3.77
7.Coventry, East                  +6.10  7.Sussex (West), Horsham        -3.72
8.Chesterfield                    +6.09  8.I'ness/R & C, Western Isles   -3.30
9.Buckinghamshire, Wycombe        +6.00  9.Yorkshire (NR), Thirsk/Malton -3.15
10.Derbyshire, Ilkeston           +5.90  10.Somerset, Weston-super-Mare  -2.96

10 Highest swings in 1959                    10 Lowest swings in 1959
1.Anglesey                        +7.34  1.Glasgow, Cathcart            -13.42
2.Wolverhampton, North-East       +7.00  2.Greenock                     -12.65
3.Bristol, Central                +6.90  3.Rochdale                     -11.13
4.Birmingham, Aston               +6.52  4.Belfast, South                -6.25
5.Shoreditch and Finsbury         +6.41  5.Manchester, Ardwick           -5.73
6.Plymouth, Devonport             +6.29  6.Glasgow, Provan               -5.33
7.Edmonton                        +6.14  7.Aberdeenshire, East           -5.17
8.Enfield, East                   +5.86  8.Chesterfield                  -4.81
9.Walsall, South                  +5.77  9.Belfast, North                -4.73
10.Southwark                      +5.73  10.Belfast, East                -4.67

10 Highest swings in 1964                    10 Lowest swings in 1964
1.Smethwick                       +7.22  1.I'ness/R & C, Western Isles  -16.96
2.Wednesbury                      +3.52  2.Paisley                      -12.54
3.Suffolk, Eye                    +3.14  3.Coatbridge and Airdrie       -11.22
4.West Bromwich                   +2.27  4.Middlesbrough, West          -11.00
5.Warwickshire, Rugby             +1.41  5.Glasgow, Springburn          -10.65
6.Cornwall, Falmouth and Camborne +1.33  6.Hampstead                    -10.57
7.Oldbury and Halesowen           +1.30  7.Glasgow, Provan              -10.20
8.Suffolk, Lowestoft              +1.12  8.Liverpool, Toxteth            -9.99
9.Durham, Houghton-le-Spring      +1.11    Banffshire                    -9.99
10.Camberwell, Peckham            +1.04  10.Liverpool, Wavertree         -9.33
   Rowley Regis and Tipton        +1.04

10 Highest swings in 1966                    10 Lowest swings in 1966
1.Angus/Kincardineshire,S Angus   +2.63  1.Birmingham, Stechford         -8.66
2.Pembrokeshire                   +2.49  2.Birmingham, Sparkbrook        -8.61
3.Anglesey                        +1.83  3.Antrim, South                 -8.44
4.Derbyshire, Belper              +1.59  4.Birmingham, Small Heath       -8.35
5.Kent, Faversham                 +1.54  5.Belfast, South                -8.33
6.Paisley                         +1.45  6.Kingston-upon-Hull, West      -7.92
7.Devon, Torrington               +1.12  7.Kingston-upon-Hull, North     -7.85
8.Norfolk, South West             +0.93  8.Camberwell, Peckham           -7.82
9.Dorset, South                   +0.92  9.Newcastle-upon-Tyne, East     -7.75
10.Cornwall, North                +0.84  10.Birmingham, All Saints       -7.71

10 Highest swings in 1970                    10 Lowest swings in 1970
1.Merthyr Tydfil                 +20.83  1.Angus/Kincardineshire,S Angus -2.75
2.Staffordshire, Cannock         +11.01  2.Warwickshire, Rugby           -2.65
3.I'ness/R & C, Western Isles    +10.51  3.Birmingham, All Saints        -1.18
4.Wandsworth, Clapham            +10.19  4.Warwickshire, Nuneaton        -1.11
5.Birmingham, Ladywood            +9.89  5.Edinburgh, South              -1.02
6.Bolton, East                    +9.74  6.Southport                     -0.88
7.Lancashire, Westhoughton        +9.52  7.Yorkshire (ER), Haltemprice   -0.74
8.Newcastle-under-Lyme            +9.50  8.Liverpool, Scotland           -0.67
9.Staffordshire, Brierley Hill    +9.46  9.Liverpool, West Derby         -0.44
10.Wolverhampton, North East      +9.14  10.Bootle                       -0.26

10 Highest swings in 1974(F)                 10 Lowest swings in 1974(F)
1.Blyth                          +17.50  1.Merthyr Tydfil               -18.51
2.Lincoln                         +5.81  2.Wolverhampton, South West    -16.6
3.Durham, City of Durham          +5.6   3.Dudley, East                 -11.4
4.Glamorganshire, Ogmore          +5.53    Staffordshire, South West    -11.4
5.Glamorganshire, Pontypridd      +5.40  5.Wolverhampton, North East    -10.6
6.Ayrshire, Kilmarnock            +5.1   6.Warley, East                 -10.2
7.Moray and Nairnshire            +5.00  7.Walsall, South                -8.7
8.Merionethshire                  +4.73  8.Warley, West                  -8.4
9.Aberdeen, North                 +4.56  9.Wolverhampton, South East     -7.7
10.I'ness/R & C, Ross & Cromarty  +4.55  10.Liverpool, Garston           -7.52

10 Highest swings in 1974(O)                 10 Lowest swings in 1974(O)
1.Sheffield, Brightside           +7.59  1.Glasgow, Central              -6.73
2.I'ness/R & C, Ross and Cromarty +2.89  2.Leeds, West                   -6.45
3.Cornwall, Falmouth and Camborne +1.81  3.Glasgow, Govan                -6.02
4.Cheltenham                      +1.49  4.Liverpool, Kirkdale           -6.01
5.Banffshire                      +1.24  5.Blyth                         -5.69
6.Cornwall, Bodmin                +1.17  6.Hove                          -5.57
7.Gloucestershire, West           +1.07  7.Leeds, South-East             -5.56
8.Cornwall, North                 +0.65    Paisley                       -5.56
9.Warwickshire, Rugby             +0.58  9.Edinburgh, Central            -5.55
10.Yorkshire (WR), Hemsworth      +0.57    Fife, East                    -5.55

10 Highest swings in 1979                    10 Lowest swings in 1979
1.Cardiganshire                  +17.68  1.Sheffield, Brightside         -5.50
2.Nottinghamshire, Ashfield      +14.33  2.Glasgow, Cathcart             -4.39
3.Tower Hamlets, Bethnal Green   +14.03  3.Dunbartonshire, Central       -3.71
4.Barking and Dagenham, Barking  +13.95  4.Glasgow, Govan                -3.44
5.Ayrshire, South                +13.88  5.Glasgow, Kelvingrove          -3.14
6.Barking and Dagenham, Dagenham +13.42  6.Glasgow, Queen's Park         -3.01
7.Birmingham, Stechford          +12.99  7.Bradford, West                -2.91
8.Essex, Harlow                  +12.90  8.Glasgow, Provan               -2.81
9.Tower Hamlets, Stepney/Poplar  +12.86  9.Glasgow, Central              -2.68
10.Anglesey                      +12.54  10.Greenock and Port Glasgow	 -2.62

10 Highest swings in 1983                    10 Lowest swings in 1983
1.Hertfordshire, West Herts.     +12.75  1.Strathclyde, Carrick, C&DV    -8.43
2.Portsmouth, North              +11.18  2.Glasgow, Cathcart             -7.60
3.Humberside, Boothferry         +10.62  3.Liverpool, Mossley Hill       -6.44
4.Bexley, Erith and Crayford     +10.49  4.Liverpool, Broadgreen         -4.76
5.Clwyd, Wrexham                 +10.48  5.Gwent, Blaenau Gwent          -4.75
6.Stockton, North                +10.45  6.Newcastle-upon-Tyne, Central  -3.85
7.Lothian, Livingston            +10.36  7.Birmingham, Ladywood          -3.75
8.Basildon                       +10.26  8.Cheshire, Crewe and Nantwich  -3.47
9.Hertfordshire, Hertford & S'fd.+10.13  9.Barnsley, Central             -3.22
10.Clwyd, Wrexham                 +9.98  10.Merseyside, Knowsley North   -3.17

10 Highest swings in 1987                    10 Lowest swings in 1987
1.Newham, Newham South            +8.95  1.Liverpool, Mossley Hill      -13.17
2.Ealing, Ealing North            +7.96  2.Liverpool, Broadgreen        -12.42
3.Haringey, Tottenham             +6.78  3.Liverpool, Walton            -11.22
4.Enfield, Edmonton               +6.26  4.Strathclyde, East Kilbride   -10.75
5.Derbyshire, Amber Valley        +5.32  5.Liverpool, Garston           -10.50
6.Waltham Forest, Chingford       +4.79  6.Paisley, South               -10.40
7.Wandsworth, Battersea           +4.63  7.Highland, Ross, Cromarty & S. -9.59
8.Norfolk, North West Norfolk     +4.21  8.Liverpool, West Derby         -9.55
9.Waltham Forest, Walthamstow     +4.11  9.Glasgow, Cathcart             -9.41
10.Brent, Brent East              +4.08  10.Glasgow, Hillhead            -9.28

10 Highest swings in 1992                    10 Lowest swings in 1992
1.Glasgow, Pollok                +10.59  1.Nottinghamshire, Mansfield   -10.59
2.Coventry, South East            +7.00  2.Leicester, East               -9.53
3.Glasgow, Govan                  +6.97  3.Haringey, Tottenham           -9.23
4.Edinburgh, Leith                +6.67  4.Waltham Forest, Leyton        -8.84
5.Aberdeen, North                 +5.18  5.Nottingham, North             -8.66
6.Central, Falkirk East           +5.09  6.Nottingham, East              -8.55
7.Grampian, Kincardine & Deeside  +4.93  7.Exeter                        -8.50
8.Strathclyde, Eastwood           +4.12  8.Ealing, Ealing North          -8.17
9.Strathclyde, Cumbernauld & K.   +4.09  9.Hove                          -8.01
10.Glasgow, Central               +4.08  10.Staffordshire, Mid-Staffs.   -7.99

10 Highest swings in 1997                    10 Lowest swings in 1997
1.Tower Hamlets, Bethnal Grn./Bow +5.92  1.Brent, Brent North           -18.83
2.Bradford, West                  +5.45  2.East Sussex, Hastings & Rye  -18.52
3.Liverpool, Riverside            -1.67  3.Crosby                       -18.15
4.Gwent, Blaenau Gwent            -1.86  4.Harrow, Harrow East          -18.09
5.Mid Glamorgan, Rhondda          -1.96  5.Waltham Forest, Walthamstow  -17.87
6.Glasgow, Baillieston            -2.31  6.Croydon, Croydon North       -17.64
7.Airdrie and Shotts              -2.66  7.Essex, Billericay            -17.58
8.Motherwell and Wishaw           -2.74  8.Harrow, Harrow West          -17.52
9.Glasgow, Maryhill               -3.05  9.Hillingdon, Hayes & Harl'gtn.-17.44
10.Lothian, Linlithgow            -3.07  10.Enfield, Enfield Southgate  -17.40

10 Highest swings in 2001                    10 Lowest swings in 2001
1.Havering, Romford               +9.14  1.Brent, Brent North            -9.77
2.Birmingham, Perry Barr          +8.96  2.Berkshire, Reading West       -7.44
3.St. Helens, South               +8.89  3.Strathclyde, Eastwood         -6.35
4.Norfolk, North Norfolk          +8.52  4.Aberdeen, South               -5.85
5.N. Yorkshire, Richmond (Yorks.) +8.00  5.Harrow, Harrow West           -5.42
6.Mid Glamorgan, Merthyr Tydfil   +7.83  6.Enfield, Enfield Southgate    -5.08
7.Barking and Dagenham, Dagenham  +7.82  7.Ealing, Ealing North          -4.95
8.Nottinghamshire, Newark         +7.41  8.Edinburgh, West               -4.89
9.Cumbria, Copeland               +7.35  9.Grampian, Moray               -4.85
10.Cumbria, Westmorland/Lonsdale  +7.17  10.Newham, East Ham             -3.95

TOP TEN HIGHEST MAGNITUDE SWINGS SINCE 1950 UNTIL 1992:

1. Merthyr Tydfil, 1970                       +20.83
2. Merthyr Tydfil, 1974(F)                    -18.51
3. Cardiganshire, 1979                        +17.68
4. Blyth, 1974(F)                             +17.50
5. Inverness-shire and Ross & Cromarty,
     Western Isles, 1964                      -16.96
6. Wolverhampton, South West, 1974(F)         -16.6
7. Nottinghamshire, Ashfield, 1979            +14.33
8. Tower Hamlets, Bethnal Green and Bow, 1979 +14.03
9. Barking and Dagenham, Barking, 1979        +13.95
10. Ayrshire, South, 1979                     +13.88

TOP TEN HIGHEST MAGNITUDE SWINGS SINCE 1950 INCLUDING 1997:

1. Merthyr Tydfil, 1970                       +20.83
2. Brent, Brent North, 1997                   -18.83
3. East Sussex, Hastings and Rye, 1997        -18.52
4. Merthyr Tydfil, 1974(F)                    -18.51
5. Crosby, 1997                               -18.15
6. Harrow, Harrow East, 1997                  -18.09
7. Waltham Forest, Walthamstow, 1997          -17.87
8. Cardiganshire, 1979                        +17.68
9. Croydon, Croydon North, 1997               -17.64
10. Essex, Billericay, 1997                   -17.58