St David’s Hall Thursday 26 May 7.30pm     GET ready for a party as the nation’s favourite variety show as That’ll Be The Day returns to St David’s Hall for its 30th anniversary extravaganza!   Celebrating the solid gold hits of the 50s, 60s and 70s combined with hilarious comedy, this special night is not to be missed.   If you love nostalgia then this is the show for you as the clocks get wound back to an unforgettable…