If you were a member of the public and heard an announcement that your journey had been delayed due to a signalling fault what would you expect it to have been? I was on the 16:05 Mallaig to Glasgow Queen Street yesterday 25/10/11 and at Crianlarich where the Oban portion is joined on. I watched the join and it failed, although the trains coupled the controls were not functioning i.e. control signals failed to join. They uncoupled at which point I rejoined the train. The Mallaig portion then pulled forward and the went back through the station and then forward again much to the puzzlement of the other passengers who were not aware what was going on, except for an announcement saying there was a problem and we would be delayed about 5 minutes. The Mallaig portion then coupled successfully to the rear of the Oban portion. We then left with a 20 minute delay which was maintained until Queen Street whereupon the announcement was made that they were sorry for the delay caused by a signalling fault. What sort of fault people thought it was that sent us back and forward through the station I do not know.