Just a quick heads to remind you that the Foursquare / Shell / American Express promotion ends on April 18th.
You will save £15 on any £50 spend at a Shell garage when you pay with any American Express card and sign-up for the promotion via Foursquare before you visit.
Even if you don’t need any petrol, the cashback would still come through on a grocery purchase. Or suprise your loved one with £50 of petrol station flowers! More usefully, some Shell garages also sell gift cards for other retailers.
Note that Foursquare has a track record of pulling registration for these deals 1 day before they expire, so don’t leave it until the 18th to sync your Amex card.
Full details on how to register for Foursquare can be found here.