© Licensed to London News Pictures. 15/06/2016. London, UK. A campaigner holds a Union Jack flag as the pro-Brexit campaign 'Fishermen for Leave', sail a flotilla of over 30 vessels up the Thames. The flotilla, including UKIP leader Nigel Farage, caused traffic issues in central London, as vessels travelled up the Thames for high tide and to coincide with the last Prime Minister's Questions before the EU referendum takes place on 23 June. Photo credit : Tom Nicholson/LNP