05-02-2014 - TFL staff assist commuters. London underground RMT and TSSA members take strike action to defend jobs and services for ticket office workers. Kings Cross. © Jess Hurd

05-02-2014 - Met policing bus stops. London underground RMT and TSSA members take strike action to defend jobs and services for ticket office workers. Kings Cross. © Jess Hurd

16-09-2000 - The opening of the Commonwealth Games swimming pool in Manchester was disrupted by protestors angry at the closure of the smaller Didsbury pool by Manchester Metropolitan University. Demonstrators fee... © Paul Herrmann

16-09-2000 - The opening of the Commonwealth Games swimming pool in Manchester was disrupted by protestors angry at the closure of the smaller Didsbury pool by Manchester Metropolitan University. Demonstrators fee... © Paul Herrmann

16-09-2000 - The opening of the Commonwealth Games swimming pool in Manchester was disrupted by protestors angry at the closure of the smaller Didsbury pool by Manchester Metropolitan University. Demonstrators fee... © Paul Herrmann

16-06-1975 - Royal Ascot races 1975 striking stable lads from Newmarket handing out leaflets to racegoers arriving in top hats and morning dress. Ascot racecourse, Berkshire © Martin Mayer

16-06-1975 - Royal Ascot races 1975 striking stable lads from Newmarket handing out leaflets to racegoers arriving in top hats and morning dress. Ascot racecourse, Berkshire © Martin Mayer

16-06-1975 - Royal Ascot races 1975 striking stable lads from Newmarket handing out leaflets to racegoers arriving in top hats and morning dress. The strikers look on bemused at a celebrity posing for photographs.... © Martin Mayer

16-06-1975 - Royal Ascot races 1975 striking stable lads from Newmarket handing out leaflets to racegoers arriving in top hats and morning dress. Ascot racecourse, Berkshire © Martin Mayer

03-05-1975 - Stable lads strike for a living wage, Newmarket races 1975 Disgruntled racegoers watching pickets march round the racecourse © Martin Mayer