My desktop this month is a photo of London Underground C-Stock trains at Farringdon Station. Introduced in 1970, they provided services on the Circle and Hamersmith & City lines. They had a mid-life refurbishment beginning in 1989 which saw the original brushed aluminium finish replaced by the livery seen in this image which was taken in 2010. Withdrawal of the class began in 2012 and continued as replacement S-Stock arrived from the manufacturers. The last C-Stock service ran in June 2014.