Already more than half of the largest 40 urban authorities in the UK have a policy of setting 20mph as the default for all their streets.

The complete list of places implementing a community-wide 20mph default with populations are :-

Bath & NE Somerset (175500)
Bolton (139403)
Brampton (4,862)
Brighton & Hove (273400)
Bristol (428100)
Bury (60718)
Calderdale (200100)
Cambridge (122700)
Camden (LB) (220100)
Cheshire West & Chester (332000)
Chichester (22731)
City of Birmingham (1074300)
City of Cardiff (346100)
City of Leeds (751,500)
City of London (LB) (400000)
City of Manchester (502900)
Clackmannanshire (51,400)
Coventry (316900)
Croydon (LB) (364800)
Darlington (106100)
Dent ( 785)
Ealing (LB) (342500)
Edinburgh (495360)
Fife (368,100)
Fressingfield (900)
Glasgow City (598830)
Greenwich(LB) (255500)
Hackney (LB) (247200)
Hammersmith & Fulham (LB) (182400)
Haringey (LB) (255500)
Hounslow (LB) (265568)
Islington (LB) (206300)
Lambeth (LB) (304500)
Lancashire (1461400)
Leicester (329600)
Lewisham (275885)
Limpley Stoke (900)
Liverpool (465700)
Middlesbrough (138400)
Middleton (500)
Newcastle-upon-Tyne (279100)
Norwich (213,166)
Nottingham (303900)
Otley (14124)
Oxford (150200)
Portsmouth (205400)
Rochdale (211900)
Sefton (272000)
Sheffield (551800)
Shipley (28162)
Southampton (239700)
Southwark (LB) (288700)
St Helens (102629)
Tower Hamlets (LB) (256000)
Tregony (1000)
Waltham Forest(LB) (259700)
West Dunbartonshire (89,600)
Wandsworth (LB) (312145)
Warrington (202700)
Westbourne (2309)
Whitchurch, Hants (4800)
Wigan (318100)
York (197800)

These are also shown below with a 20mph or a 30km/h sign. Other icons show our local 20's Plenty campaign groups (blue for towns and yellow for villages)