Hi. I had a start problem and it turned out to be a relay (like a car fuse). It is housed in a black box under the bonnet. By pushing or wiggling them it was found that one was faulty and this was causing the problem (you might need someone trying to start it while you fiddle) Check the number on it and swap it with another one the same and see if that works (you might even see marks where it comes out of which might indicate which one it could be). Hope it helps but it's a cheap easy thing to try.