Just been to the local JJB sports and picked up a load of gym gear (jogging bottoms, t shirts etc) most for £1 each. The brands are Olympus and Champion. There was a lot more in stock in the store than is showing online although there are sale items online for £1. It seems to be more limited to certain sizes. Swimming costumes for £1, Swim Vest £1, T Shirts £1.24 etc etc
This seems to be better for women than men but ideal for anyone joining the gym for the new year!