London Underground employees organised by the National Union of Rail, Maritime and Transport Workers and Transport Salaried Staffs Association (TSSA) have had several disputes with both London Underground and privatised contractors including Metronet and Tube Lines over pay, safety, pensions and job security, leading to travel disruption in the capital.
Due to the disruption, this causes, the usage of both driverless trains and retired train drivers have been suggested as solutions to keep services running on strike days.
In two separate polls, the Evening Standard found that a large majority of Londoners were in favour of making it more difficult for Tube workers to strike.
In the first poll in 2013, 59% agreed that it was too easy for them to go on strike and 14% disagreed. In the second poll in 2014, 56% were in favour of banning Tube strikes unless 50% of eligible union members voted in favour of a strike.