Thermalite Coursing Brick 2.9n 215mm x 65mm x 100mm Ibstock Leicester Red Stock Bricks 65mm (Leicester) Thermalite Aircrete Shield Block 3.6n 440mm x 215mm x 100mm (10 blocks per m2) Thermalite Aircrete Tongue & Groove Trenchblock 3.6n 440mm x 215mm x 300mm Ibstock Tradesman Heather Mixture Bricks 65mm (Atlas)