Lieutenant General Roly Walker will assume the role amid ongoing debates about cuts to troop numbers at a time when Russian forces are waging war in Europe.
It willbe a fitting tribute to a man who raised millions for the NHS, a feat that saw him knighted by the Queen.
Capt Tom also reached number one in the music charts with a recording of You ll Never Walk Alone alongside Michael Ball.
He died yesterday morning after a short battle with pneumonia and Covid.
Prime Minister Boris Johnson led tributes to the war veteran, saying: Captain Sir Tom Moore was a hero in the truest sense of the word. In the dark days of the Second World War, he fought for freedom and in the face of this country s deepest post-war crisis, he united us all, he cheered us all up, and he embodied the triumph of the human spirit.