We've been here just about five years, but this is only baby number one on the way, so the parenting side is very new to me. :) We're in Oxford, where they run all sorts of vaccine trials, so I'm not sure it's the most friendly place to be into alternative plans, heh. The link above is the first clinic site I've seen where you can get single vaccines, though I hear that some NHS trusts offer them as well. I think it's sort of luck of the draw there though.
I've heard about a place in Birmingham (turns out they have several locations), which I think was this centre: http://www.childrensimmunisation.com/ where you can get the MMR in separate vaccines. There are several places where you can do this I think, actually, in response to the autism scare a few years ago. That this place also does Botox sets me back a bit, I admit, thinking that maybe they're just in it for the money.
I've been reading different things about the home visitors, but it seems to be all anecdotal. Most of what I can find says that you don't have to accept visits, but then there's a good chance that Social Services will come knocking at your door. Brother. :D The midwife I have through the NHS is fab...down with homebirth, etc so maybe I'll get a progressive thinking HV too?
Whereabouts are you in the UK? If you're in the Southeast, I think it's a lot easier to get access to "alternative" healthcare.