South East: New Constituency Boundaries 2023

Each new seat can be described as a combination of parts of old seats. These tables show this decomposition. The winner of the old seat at the 2019 election is shown by party colour, as is the implied winner of the new seat.

The implied results are calculated using the local election results for the wards which make up each old seat. This should give the most accurate projection, since it reflects varying political behaviour across the seat.

South East Change Table

PartyOld SeatsNew SeatsChangeDisappearSwitch OutSwitch InFresh

The table shows how the various changes affect each party in this area. The total old and new seats are shown for each party, as well as their difference ('Change'). The change in seats is also explained through the four explanations:

The old seats which are disappearing are: Meon Valley.

The new seats which are freshly created are: Bicester and Woodstock; Buckingham and Bletchley; Earley and Woodley; East Grinstead and Uckfield; Godalming and Ash; Hamble Valley; Isle of Wight West; Weald of Kent.


New seatPrimary componentSecondary component(s)
Bracknell 81.1% of Bracknell 7.8% of Windsor
Earley and Woodley 35.8% of Wokingham 32.6% of Reading East
11.5% of Reading West
8.8% of Maidenhead
Maidenhead 73.9% of Maidenhead 21.2% of Windsor
Newbury 85.6% of Newbury
Reading Central 67.4% of Reading East 26.2% of Reading West
Reading West and Mid Berkshire 62.3% of Reading West 14.4% of Newbury
13.8% of Wokingham
Slough 89.4% of Slough
Windsor 71.0% of Windsor 14.9% of Runnymede and Weybridge
10.6% of Slough
Wokingham 50.5% of Wokingham 18.9% of Bracknell
17.3% of Maidenhead


New seatPrimary componentSecondary component(s)
Aylesbury 66.9% of Aylesbury 22.0% of Buckingham
Beaconsfield 92.1% of Beaconsfield
Buckingham and Bletchley 42.4% of Milton Keynes South 39.6% of Buckingham
Buckinghamshire Mid 38.4% of Buckingham 32.5% of Aylesbury
17.2% of Chesham and Amersham
Chesham and Amersham 82.8% of Chesham and Amersham 9.6% of Wycombe
7.9% of Beaconsfield
Milton Keynes Central 43.6% of Milton Keynes South 37.7% of Milton Keynes North
Milton Keynes North 62.3% of Milton Keynes North 14.0% of Milton Keynes South
Wycombe 90.4% of Wycombe 0.7% of Aylesbury

East Sussex

New seatPrimary componentSecondary component(s)
Bexhill and Battle 79.7% of Bexhill and Battle 6.1% of Hastings and Rye
Brighton Kemptown and Peacehaven 100% of Brighton Kemptown 1.5% of Brighton Pavilion
Brighton Pavilion 98.5% of Brighton Pavilion
Eastbourne 92.0% of Eastbourne
Hastings and Rye 93.9% of Hastings and Rye 1.5% of Bexhill and Battle
Hove and Portslade 100% of Hove
Lewes 88.5% of Lewes 8.0% of Eastbourne
5.0% of Bexhill and Battle
1.3% of Wealden
Sussex Weald 70.2% of Wealden 13.7% of Bexhill and Battle


New seatPrimary componentSecondary component(s)
Aldershot 100% of Aldershot 6.2% of Hampshire North East
Basingstoke 86.1% of Basingstoke 7.1% of Hampshire North West
Eastleigh 57.5% of Eastleigh 22.4% of Winchester
6.9% of Romsey and Southampton North
Fareham and Waterlooville 53.9% of Fareham 45.7% of Meon Valley
Gosport Unchanged
Hamble Valley 46.1% of Fareham 42.5% of Eastleigh
6.1% of Meon Valley
Hampshire East 66.0% of Hampshire East 23.6% of Meon Valley
1.2% of Hampshire North East
0.5% of Hampshire North West
Hampshire North East 86.9% of Hampshire North East 8.2% of Basingstoke
Hampshire North West 80.3% of Hampshire North West 5.8% of Basingstoke
5.7% of Hampshire North East
Havant Unchanged
Isle of Wight East 50.8% of Isle of Wight
Isle of Wight West 49.2% of Isle of Wight
New Forest East Unchanged
New Forest West Unchanged
Portsmouth North Unchanged
Portsmouth South Unchanged
Romsey and Southampton North 93.1% of Romsey and Southampton North 12.2% of Hampshire North West
Southampton Itchen Unchanged
Southampton Test Unchanged
Winchester 77.6% of Winchester 24.6% of Meon Valley


New seatPrimary componentSecondary component(s)
Ashford 63.6% of Ashford 18.6% of Folkestone and Hythe
Canterbury 94.3% of Canterbury 0.0% of Thanet North
Chatham and Aylesford 89.2% of Chatham and Aylesford 12.5% of Rochester and Strood
Dartford 86.8% of Dartford
Dover and Deal 100% of Dover 0.9% of Thanet South
Faversham and Kent Mid 88.2% of Faversham and Kent Mid 8.4% of Sittingbourne and Sheppey
Folkestone and Hythe 79.1% of Folkestone and Hythe
Gillingham and Rainham Unchanged
Gravesham Unchanged
Herne Bay and Sandwich 82.6% of Thanet North 15.1% of Thanet South
5.7% of Canterbury
Maidstone and Malling 64.8% of Maidstone and The Weald 20.1% of Tonbridge and Malling
10.8% of Chatham and Aylesford
Rochester and Strood 87.5% of Rochester and Strood
Sevenoaks 93.6% of Sevenoaks 7.4% of Dartford
Sittingbourne and Sheppey 91.6% of Sittingbourne and Sheppey
Thanet East 84.1% of Thanet South 17.4% of Thanet North
Tonbridge 79.9% of Tonbridge and Malling 5.9% of Dartford
6.4% of Sevenoaks
Tunbridge Wells Unchanged
Weald of Kent 36.4% of Ashford 35.2% of Maidstone and The Weald
11.8% of Faversham and Kent Mid
2.4% of Folkestone and Hythe


New seatPrimary componentSecondary component(s)
Banbury 61.0% of Banbury 17.6% of Witney
Bicester and Woodstock 39.0% of Banbury 20.1% of Witney
18.0% of Oxford West and Abingdon
5.7% of Henley
Didcot and Wantage 78.6% of Wantage 2.9% of Henley
Henley and Thame 91.5% of Henley
Oxford East 91.4% of Oxford East
Oxford West and Abingdon 80.9% of Oxford West and Abingdon 8.6% of Oxford East
2.8% of Wantage
Witney 62.4% of Witney 18.6% of Wantage
1.1% of Oxford West and Abingdon


New seatPrimary componentSecondary component(s)
Dorking and Horley 63.4% of Mole Valley 22.0% of Surrey East
3.7% of Reigate
2.1% of Guildford
Epsom and Ewell 84.9% of Epsom and Ewell 11.4% of Mole Valley
Esher and Walton 83.8% of Esher and Walton 6.2% of Runnymede and Weybridge
Farnham and Bordon 59.0% of Surrey South West 34.0% of Hampshire East
Godalming and Ash 41.0% of Surrey South West 24.6% of Guildford
18.7% of Surrey Heath
6.0% of Mole Valley
Guildford 73.3% of Guildford 19.1% of Mole Valley
Reigate 85.8% of Reigate 15.1% of Epsom and Ewell
Runnymede and Weybridge 78.9% of Runnymede and Weybridge 16.2% of Esher and Walton
Spelthorne Unchanged
Surrey East 78.0% of Surrey East 10.5% of Reigate
Surrey Heath 81.3% of Surrey Heath 5.9% of Woking
Woking 94.1% of Woking

West Sussex

New seatPrimary componentSecondary component(s)
Arundel and South Downs 68.1% of Arundel and South Downs 24.5% of Chichester
0.1% of Bognor Regis and Littlehampton
Bognor Regis and Littlehampton 84.7% of Bognor Regis and Littlehampton 14.3% of Worthing West
Chichester 75.5% of Chichester 15.2% of Bognor Regis and Littlehampton
Crawley Unchanged
East Grinstead and Uckfield 30.3% of Sussex Mid 28.5% of Wealden
16.6% of Horsham
11.5% of Lewes
Horsham 83.4% of Horsham 5.4% of Arundel and South Downs
Sussex Mid 69.7% of Sussex Mid 15.7% of Arundel and South Downs
Worthing East and Shoreham Unchanged
Worthing West 85.7% of Worthing West 10.8% of Arundel and South Downs