I only use two merchants, days of chasing a £5 saving on a boiler are gone for me. I value good service and being able to call up and ask for a delivery time and it actually arriving on time. I stopped using one merchants after two promised "first drops" of the day on the delivery lorry turned up at 12pm and 1pm. Both times it was the start of a big install and all materials were being delivered which resulted with me and a subby being limited on what work we could do. So it cost me money. Williams are now my first choice of merchant, as I trust my local branch to follow through on what they say.