Can I use the cards in-store or online?

It depends on the retailer. See below a list of where you can redeem their cards.

Asda - redeemable in-store and online

Morrisons - redeemable in-store only

Tesco - redeemable in-store only

Sainsbury's - redeemable in-store and online

Amazon - redeemable online only

Argos - redeemable in-store and online

B&Q - redeemable in-store and online

John Lewis - redeemable in-store and online

Currys PC World - redeemable in-store and online

Halfords - redeemable in-store and online

National Express - redeemable online only

Uber - redeemable online only

Costa - redeemable in-store only

Caffè Nero - redeemable in-store only

Sports Direct - redeemable in-store and online

Primark - redeemable in-store only

New Look - redeemable in-store and online

Decathlon - redeemable in-store and online

Clarks - redeemable in-store only

Foot Locker - redeemable in-store only

Adidas - redeemable in-store and online

River Island - redeemable in-store and online

FatFace - redeemable in-store and online

Not On The High Street - redeemable online only

asos - redeemable online only

National Book Tokens - redeemable in-store and only

Waterstones - redeemable online only

National Trust - redeemable in-store and online

Ernest Jones - redeemable in-store and online

Just Eat - redeemable online only

Deliveroo - redeemable online only

Pizza Express - redeemable in-store only

Pizza Hut - redeemable in-store only

Harvester - redeemable in-store only

The Restaurant Card- redeemable in-store only

Turtle Bay - redeemable in-store only

Prezzo - redeemable in-store only

Great British Pub Card - redeemable in-store only 

Toby Carvery - redeemable in-store only

All Bar One - redeemable in-store only

Vintage Inns - redeemable in-store only

Bonmarché - redeemable in-store and online.