sentences:  For seven years he was an unpaid campaigns organiser in Bermondsey and Southwark, being thanked by Tony Blair in 1998 at Downing Street.Piers Corbyn left the Labour Party in 2002 in the run up to the invasion of Iraq, and stood as an independent candidate on housing issues in the Southwark election in 2015.According to "The Sunday Times" in September 2017, his attempt to rejoin the Southwark Constituency Labour Party in January 2017 was blocked.