From youtube:
"The new 60 sec Barclaycard ad which shows an office worker taking off his clothes and getting into a waterslide, which he rides on his commute home. During his journey, the commuter, played by Gavin and Stacey actor Robert Wilfort, uses a Barclaycard to swipe his way through subway system gates and buy groceries.
The ad features the 1976 single 'Let Your Love Flow' by the Bellamy Brothers. "