I made it at last! Thank you for wasting your time on this. The crucial point was the precise position you have to have at the left side when the level begins. I had not realised that one does not only have to drag Willy to the left, but as soon as he reaches the wall, to give him an instantaneous move on the right, so that he faces the train. This trick makes him hide from it. 38 years of paying Manic Miner and it's now that I realised that point. Thanks again!