This isn’t strong enough to be a fact but there’s a tendency all the same:
West Country powerhouse – why the South West has become English rugby’s dominant region
Soccer was, largely enough, the game of the industrial proletariat. The West Country didn’t have a lot of that. It’s for this reason that there have been, at times, no Premiership teams south west of a Bristol to, erm, Southampton? line. One of the poorest areas of the country from the 1830s onwards, as that industrial prole thing first began, was Dorset. That old North South divide on poverty etc worked the other way a century and more back.
As I say, this isn’t true enough to be absolute fact but there’s a trend there, definitely.