Map showing the Welsh Assembly regions in 2011.
Equirectangular map projection on WGS 84 datum, with N/S stretched 163%
Geographic limits:

West: 5.5W
East: 2.5W
North: 53.5N
South: 51.3N
Ordnance Survey OpenData:

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