Am wanting to travel Blackpool to London Euston (1 adult, return, without railcard) over half term. Can travel anytime from May 24th but must be back in Blackpool by June 3rd. Have been told there are Virgin Advance Single C tickets out there for £16.50, but I can't seem to find any. Anyone help, please? Could tavel in and out of Preston if this cuts the price. Any suggestions would be gratefully received.