I have a pair of brogue Dr Martens (made in England) bought 7 years ago that are still going strong - they are a mens UK 5. I'm thinking of buying either one of these styles. Should i go for a UK 6 if I'm usually a US 7.5?
I'd say you should stick with UK5.
I have the Darcie boot (the plain boots with heels) in UK6 (which is the same size as all of my other Docs). I normally wear 8-8.5 US, and I'd say that the UK6 run a little on the big side, but the next size down is just a teeny bit too small for me.