Map showing the routes of the M4 motorway and A4 road. The background map shows the European regions of England and Wales. Equirectangular map projection on WGS 84 datum, with N/S stretched 170%
Ordnance Survey OpenData.

Great Britain coastline and European region boundary data from Boundary-Line product.
Road data from Meridian 2 product.National Geospatial-Intelligence Agency

Coastline (and Lough Neagh) data
Nilfanion