Saw this on Instagram and when I logged in to my account it was there in the 'Offers' section
Also available on orders placed via Subway® and Deliveroo Apps
Offer terms
*Offer expires 31/03/2020. Receive a free cookie with any sub, wrap, salad or panini purchase. May not be combined with any other coupon offers, discounts or special deals. One coupon per customer per transaction at participating restaurants. White Chip Macadamia Cookie contains tree nuts and all cookies may contain traces of tree nuts and peanuts. Reward Dollars expire exactly one year after they are earned. ©2020 Subway IP LLC. Subway®, Subway 6-Inch® and Subway Footlong® are registered trademarks of Subway IP LLC.