I was issued a fine for moving into a bus lane to allow a fire engine to pass safely in Acre Lane ? on the photos it clearly showed the blue-lighted engine coming at me. There was also a traffic island and an oncoming vehicle, so I was avoiding a pile-up. I had to go through all levels of appeal, was rejected at least once but eventually the charge was withdrawn. General advice, don't go into bus lanes, generally it's not too hard!