I may, unexpectedly, have to go to Cardiff this weekend. Travelling outbound Sat 22 Aug 15 arriving no later than 1430, travelling back either late on Sun 23 Aug 15 or early on Mon 24 Aug 15. The cheapest tickets I can see are £74 Offpeak return if I return on the Sun or at 0955 or later on the Mon. Anyone got any bright saving ideas? If I had to go on to Swansea how might that change things? Ta in advance.