I had some work done on my mother's roof last autumn by an independent tradesman. I paid him cash and the work seemed fine. He called at my own door out of the blue today, telling me he had to 'inspect' the work he'd done as this was a requirement of his trade (doubt that) and could he check it. I thought nothing of it (was a bit distracted as I had a workman of my own in today) and told him to go ahead. He then phoned me to try to get more money, said tiles had slipped etc. It may well have been the case but the house is up for sale and sale is going through in a few weeks, no longer my problem. I said I wasn't interested. He then tried to charge me a £150 'inspection fee'! This was never mentioned at the door, never mind the cost. He has been phoning ever since and has threatened to come back to my house - I'm here on my own and have no-one to call on to back me up. Can anyone advise me what to do or to say to him or threaten him with to get him to eff off.