As a promotion for Subway's new 'Subcard' loyalty program, the outlet is giving away a free six-inch sub/wrap & a drink to the first 100,000 people who download the Subway app and sign up to the program.
Not exactly sure how you can redeem the free meal though - have signed up myself but don't see anything in the app about the offer
I think this works, I ticked that box when creating an account and got my free meal voucher emailed to me about 2 hours after signing up