According to the UK Army Roll of Honour 1939-45, 7020831 Pte David Gillender of the 7th Battalion, The Black Watch died on the 23rd October 1942. The Commonwealth War Graves Commission is less certain and records only that he died between the 23rd and 24th October 1942.
David was the son of Robert and Jane Gillender of Belfast, Northern Ireland and he died in the fighting around El Alamein. He is buried in the El Alamein War Cemetery.
At the going down of the sun, and in the morning, WE WILL REMEMBER THEM.
Ancestry.co.uk (1939-1945 Roll of Honour)
Commonwealth War Graves Commission