Prior to changes in July 2006, when the number of ambulance service trusts was reduced to 13, England was covered by 31 ambulance trusts, which were structured as below. For the current trusts, see Emergency medical services in the United Kingdom
| Ambulance service |
metropolitan and non-metropolitan counties covered |
| Avon |
Bath and North East Somerset, Bristol, North Somerset, South Gloucestershire |
| Bedfordshire and Hertfordshire |
Bedfordshire, Hertfordshire, Luton |
| Coventry and Warwickshire |
Coventry, Warwickshire |
| Cumbria |
Cumbria |
| Dorset |
Bournemouth, Dorset, Poole |
| East Anglian |
Cambridgeshire, Norfolk, Peterborough, Suffolk |
| East Midlands |
Derby, Derbyshire, Leicester, Leicestershire, Nottingham, Nottinghamshire, Rutland |
| Essex |
Essex, Southend-on-Sea, Thurrock |
| Gloucestershire |
Gloucestershire |
| Greater Manchester |
Greater Manchester |
| Hampshire |
Hampshire, Portsmouth, Southampton |
| Hereford and Worcester |
Herefordshire, Worcestershire |
| Isle of Wight |
Isle of Wight |
| Kent |
Kent, Medway |
| Lancashire |
Blackpool, Blackburn with Darwen, Lancashire |
| Lincolnshire |
Lincolnshire, North Lincolnshire, North East Lincolnshire |
| London |
Greater London |
| Mersey |
Merseyside, Cheshire, Halton, Warrington |
| North East |
Darlington, County Durham, Northumberland, Tyne and Wear |
| Oxfordshire |
Oxfordshire |
| Royal Berkshire |
Berkshire |
| South Yorkshire |
South Yorkshire |
| Staffordshire |
Staffordshire, Stoke-on-Trent |
| Surrey |
Surrey |
| Sussex |
Brighton and Hove, East Sussex, West Sussex |
| Tees, East and North Yorkshire |
East Riding of Yorkshire, Kingston upon Hull, Hartlepool, Middlesbrough, Redcar and Cleveland, Stockton-on-Tees, North Yorkshire (excl. Craven), York |
| Two Shires |
Buckinghamshire, Milton Keynes, Northamptonshire |
| West Midlands |
Shropshire, Telford and Wrekin, West Midlands less Coventry |
| West Yorkshire |
West Yorkshire, Craven district of North Yorkshire |
| Westcountry |
Cornwall, Devon, Plymouth, Somerset, Torbay |
| Wiltshire |
Wiltshire, Swindon |