HESH was for some time a competitor to the more common HEAT round, again in combination with recoilless rifles as infantry weapons, and was effective against tanks such as the earlier models of the T-55 and T-62. Later versions had a layer of spall liner, which decreased the effectiveness of the HESH round. In the 1960s, Britain also devised anti-tank guided missiles with HESH warheads, such as the Malkara, although most subsequent designs used variants of the HEAT concept.