Map of the East of England region showing the administrative districts.
Equirectangular map projection on WGS 84 datum, with N/S stretched 160%
Geographic limits:

West: 0.8W
East: 1.8E
North: 53.1N
South: 51.4N
Ordnance Survey OpenData:

County boundaries (from Boundary-Line product)
Coastline data for Great Britain (from Boundary-Line product)
Nilfanion, created using Ordnance Survey data