Strikes by train drivers could continue for three more years, a trade union boss has warned.Aslef general secretary Mick Whelan spoke as the majority of Britain's train services were cancelled on Friday due to industrial action.

Strikes by train drivers could continue for three more years, a trade union boss has warned.Aslef general secretary Mick Whelan spoke as the majority of Britain's train services were cancelled on Friday due to industrial action.