Sorry, bit late on this but probably have some info. We planted two acres of vines last year (2014) - a grand total of 2200 vines. We used Simon from Vine and Wine initially but I can't wholeheartedly recommend him. He was recommending by Plumpton where my husband went on one of their vineyard courses and he did come down to see us (and we're Kent so it's a long way) but also promised a big report with everything we needed to know and do. The report never appeared so we were left with the discussion we'd had but no more. Mind you, he didn't charge us for the visit either - and we did order the vines through him (his office staff are more efficient than he is on paperwork).
We also used
http://vine-works.com/ - they were the other company recommended by Plumpton and are much closer to use in Sussex. James is also not that easy to get hold of but in person he knows his stuff and he has the contacts to help plant/trellis. So he arranged a German/Polish planting crew which did all the planting for us (you might not need it for smaller numbers) and then there was a Romanian crew who came over in September to put the trellis up for us (we used a local fencer for the end posts which are wood).
I've had some contact with two other suppliers:
http://www.winegrowers.info/ - I've just ordered some metal stakes through Derek because he's cheaper than the others but don't know anything apart from that (and they're not here yet....). But he's in Somerset so maybe convenient for those in the South-West and he consults.
http://www.vineyardsolutions.co.uk/ - who are Essex based and might be better for the OP (if he's still reading!). I had them quote for the trellis but have not met Ian in person. I think he would have been cheaper but we went with James because he already knew our land etc. Ian was quick to respond via e:mail which I normally take as a good sign!
I think they will all order vines for you as well as advising on the rest of the set up. It probably is worth going on a course though if you're going to be serious about it! Vines don't get dispatched from Germany until May because they have to be sure to miss the last frost here in their first year - they're kept in cool conditions there to extend their dormancy so they arrive bare root.
Any more questions, feel free to shout. I'm just into spraying course and crap like that now!