High street sandwich chain Subway is to give away free six-inch subs to anyone who buys a large drink on 14 February.

As part of its first Customer Appreciation Day, which will see a month of offers and deals for customers, Subway will be giving away six-inch subs with every large dispensed drink (597ml) or 500ml bottle of water purchased in participating stores nationwide.

The offer is supported by a #FreeSubFace social media campaign featuring comedian Arron Crascall. As part of this he will be surprising the public with free subs to showcase the campaign.

The offer will be available on 14 February between 11am and 7pm in the UK and all day in Northern Ireland.

In addition, customers who take up the Customer Appreciation Day offer will receive a ‘bounce back’ voucher, which is redeemable from 15 February to 1 March. For 99p, customers can get a Mega Melt six-inch breakfast sub or a six-inch sub free with any purchase of a six-inch sub and large dispensed drink (597ml).

Sacha Clark, marketing director, Subway UK and Ireland, said: “Strong customer relationships are at the heart of each Subway store. So what better way to show our customers our appreciation than on the most romantic day of the year?”