Yep it's just here https://www.hotukdeals.com/freebies/free-gym-peterborough-17-04-15-19-04-15-2187730 :)
Any more codes for the Gym group?
not for edinburgh
Failed to work for London Chadwell Heath 3rd april
I tried a different location and this came up 'As the date you have selected is an open day, your membership fee has been removed.' Possibly nationwide. Heat added!