I'm building a site to sell Land Rovers and would like help breaking the UK up into between 5-10 regions.
Any help appreciated, thanks. Hi, I want to support what Ed said; but with Scotland - while there are good reasons to divide it into two geographical areas - I'd say population wise it is more efficient to regard the whole of Scotland as one region. Same goes for Wales and for Nothern Ireland.
As for England, I support Justa Bloke's website example; another one would be
or, slightly more sub-divided:
As you will see from comparing those three websites, there are certain regional areas and boundaries in England that people are used to; keeping more or less in line with those customary regions [allowing of course for modifications that seem necessary to you business wise] would certainly help people with finding their way through your website.