I tried using -xml, but it behaved in the same way as the +xml. Anyway when I use "Content-Disposition" it stops IE from downloading the file.
When you said mainland, I first thought you meant Europe, but your username suggests your referring to Britain.
Anyway, I do plan to do Britain at a later stage, but in pieces - you’ve got a crazy population density over there (my project is
if your interested). Anyway, if you’re looking for an SVG map, get yourself "IMS Web Dwarf". It converts bitmaps to SVG.