Associated Society of Locomotive Engineers and Firemen
(重定向自ASLEF)

The Associated Society of Locomotive Engineers and Firemen (ASLEF) is a British trade union representing train drivers. It is part of the International Transport Workers' Federation and the European Transport Workers' Federation.
At the end of 2014 ASLEF had 20,364 members of which 18,126 are active and 2,238 are retired members. Its current General Secretary is Mick Whelan.