The RMT (National Union of Rail, Maritime and Transport Workers) is a trade union specialising in the transport sector, whose members include workers within the rail industry.  The ASLEF (The Associated Society of Locomotive Engineers and Firemen) is the UK's Train Drivers' Union.  The Transport Salaried Staffs' Association (TSSA) is an independent trade union for the transport and travel trade industries with members across the UK and Ireland.