I have employed someone for 7 years to prune my trees. Recently he advised me to have my garden sprayed to kill honey fungus. I agreed. The spray has killed everything and my garden which I have built up over 8 years is a wasteland. I want compensation. However he is a traveller. Is it worth making a legal claim? I think he might just get a new phone and move and disappear. What would you do? It will cost over £5,000 to get the garden re established. 