I have recently had two bathrooms refitted, and my plumber told me to go to ACBathrooms Ltd. They have quite a range of lines from different producers, and have been good. I went to their Sheffield Depot and quoted my plumbers name. They gave me a good discount (about 30% on retail), and delivered in the house. I paid by card and was given a receipt with VAT etc
All together quite happy, and being a supplier with a Sheffield Depot helped for a quick replacement of a tap (they had delivered the wrong type).