Hi

I can recommend a shop in Kew Road, Richmond called Original Bathrooms, ask for Alex who was very helpful.
I bought narly everything there ( some cheap ex display quality fittings as well), my bathroom looks beautiful & I hope to post some pics soon.
A good tile shop Ceramic Warehouse on Acton / Chiswick boarders ( Aparna a very nice & helpful, they can also provide free samples)
Don't forget you can always ask for price matching, discount etc. I found the cheapest prices on the internet & asked suppliers to match them in the shops.
If you need a good, reliable builder let me know so will email you all details.

Hope this helps.. good luck with your bathrooms.
Monia