The good chaps at Terrain Warehouse UK offer a discount scheme to Wargames club members including the Bedford Gladiators. Just register on their website: http://www.terrainwarehouse.co.uk/ and then request the club discount.
The discount is an impressive 15% on all their own items, or 10% on other stock. I for one can recommend their movement trays which paint up very nice. They stock a wide range of other useful products too – http://www.terrainwarehouse.co.uk/