A spokesman for First Great Western trains has told ITV News Meridian that it was a 'miracle' that the driver was not more badly injured when a rock smashed through his window.
On the stretch of track that the train was driving along, the trains can go up to 85 miles-per-hour. I'm not exactly sure what speed the train was doing but it was enough that the object completely obliterated the driver's window. I'd hate to think what would have happend if the train had been going at full speed. The driver and the passengers had a very lucky escape. Understandibly the driver is very upset by the experience.