This company turned up and completed the work in less than 1 hour, the engineer left and sat in their van until it had been 1 hour 13 minutes since arrival. They have now charged me (£80) for this time sat outside doing nothing!
When challenged they showed me a signature that isn't even mine saying that confirmed I 'accepted' that as the departure time. When you complain you get a faceless email with no names.
DO NOT TRUST THEM