I used a company called "Affordable Granite" in Betchworth, Surrey. I
managed to do the whole kitchen (admittedly a small kitchen) for just over
£1000. including fitting. Quotes from more traditional sources were nearer
£5000.

The guys (contracted kitchen fitters) do the exact measuring cutting and
fitting on site. This proved v. useful as I had made a slight error in my
measurements which could have been dificult if the granite was prepared
elsewhere.

The downside was that you have to use set sizes of granite which are cut
down to size. This means a long continuous length will need to be made of
several pieces. Also they finished the joins with black sealant which I will
have to redo as it wasn't that neat.

On the plus side the cost made it comparable or even cheaper than using a
wooden worktop when the specialist labour that I would have needed was
inclued. Also, despite the sealant joins (which I will redo when I have
time) the granite looks great, and has all the advantages of granite.