the first answer that comes to me is Surrey: absolutely no Labour tradition (the county has never elected a Labour MP, and even the areas of the county that were absorbed into London contains some of the most anti-Labour regions of the capital), no real Liberal tradition (they returned 3 Liberals in the 1906 landslide and Guildford ramdomly returned a Lib Dem in 2001; they've enjoyed some local success, but as small c-conservatives), no radical tradition before then (well, unless you go to like, the Diggers, who weren't exactly popular locally). It basically transitioned seamlessly from sleepy gentry-controlled rural fiefdom to favoured domitary of the most well-off of London commuters, with little of the more working-class/lower middle-class towns that dot many of the other supposed "bourgeois" Home Counties. Of course, in the supposed realignement of Brexit, the Lib Dems desperately tried excising Tory domination, but their efforts proved fruitless.
It's not an accident that J.K. Rowling located Harry Potter's hyper-conservative abusive stepparents in a fictitious London suburb called Little Whinging in Surrey. (Although I'm not an expert on the UK, Harry Potter seems to draw a lot on stereotypes about place and class when it comes to its characters' backgrounds.)