Difficult to find any upstanding companies in this day and age, especially in the building trade but these guys are exceptional. In my experience, everything is delivered in the correct quantities, often cheaper than the big boys, faster than expected delivery, and very high quality products. Timber especially is 90% straight. I can't recommend them enough if you have a local building project.

I had a sheet of roofing cement I found on my allotment plot which I sent for testing. Clearwater Environmental were incredibly knowledgable and helpful. It was so easy. Paid online with paypal, bagged and sent a sample. Two days later I had the result. Cost about £5, which compares to £30 for a local lab in SE london for the same test, or £100 for the council to come out and do the same thing as me. Very pleased