Whitewater the Canoe Centre. This is the largest shop for watersports equipment in or around London. It has everything you need to go paddling and is based at Shepperton (London).
Swindon Watersports. This well-stocked little shop is right next to Half Penny Bridge in Lechlade on the River Thames. They also run paddlesports courses too.
The SUP HUT / Surf-Unique-Paddlesports is a shop in Swansea for all things Stand Up Paddle Boarding. The shop is run by Matt Barker-Smith who was the BSUPA British SUP surfing champion three times. The shop caters for flatwater, sup racing, exploring, cruising, riding waves or foiling and riding above them.