Trades Union Congress (TUC) General Secretary Frances O'Grady poses for a photograph before an interview with Reuters in London, Britain January 26, 2016. Britain's trade unions are close to joining the push to keep the country in the European Union, bringing grass-roots muscle to a fight that has so far been dominated by big business and bankers, the head of the country's largest union group said. Unions will fight to stay in, emphasising jobs and workers' rights, Frances O'Grady, general secretary of the Trades Union Congress, told Reuters in an interview.REUTERS/Stefan Wermuth