[ThomasJ]

It might have had something to do with the delay to the 7.36 longford train. which is always very overcrowded. This train was dangerously overcrowded yesterday. with the delay to the longford train, the four car train that usually follows it would not have been able to cope and would have left large backlog of passengers. The early departure was probably done to minimse the large passenger numbers that would have build up on the platforms as a result of the delay. IE have have implemented alternative arrangements for when the 7.36 was delayed before, including trains starting from clonsilla. The delayed longford train would have then covered any passengers that were inconvinienced by the early departure of the 7.57 train