I keep getting: 'The promotional code you entered cannot be applied to your purchase' or... 'The promotional code you entered has already been redeemed' (except I haven't used it).
Edited by: "Marzman" 29th Aug 2017
Great spot @alizi1 just to let you and others know, if you use the same method you can get Gran Turismo: Sport for £4 extra "£39.00 for Prime users" which I think will be a better bet 🎮
'The promotional code you entered has already been redeemed' (except I haven't used it).