I ordered a new front door from CTG having accepted a good quote from them. The lead time was as promised, and they answered my query about fitting a door knocker straight away.
The fitters were Casey and Ian, who were cheerful, professional and fast workers. Unfortunately, having taken out the old door and frame, when they unwrapped the new door, they noticed a small nick in the frame, and so immediately ordered a replacement. This meant that the new door had to be fitted on a temporary basis, but they came back this week with the new frame and carried the work out very tidily. Excellent service.