With his battalion, Clutterbuck returned to the United Kingdom in July 1940, ten months after the outbreak of the
Second World War, which soon became part of Brigadier
Sir Oliver Leese's
29th Independent Infantry Brigade Group. In October he was promoted to the acting rank of brigadier and succeeded Brigadier
Evelyn Barker in command of the
10th Infantry Brigade, part of the
4th Infantry Division, stationed in the United Kingdom in
Southern England awaiting a
German invasion. and became
General Officer Commanding (GOC) of the
1st Infantry Division in succession to Major General
Edwin Morris. In June 1942 the division was converted into a 'mixed' division of two infantry brigades and one tank brigade, before reverting to a standard infantry division in November. In late February 1943 the division left the United Kingdom, destined for
French North Africa, where, from late April, it was involved in heavy fighting in the final stages of the
Tunisian campaign, mainly under the command of Lieutenant General
Charles Allfrey's
V Corps, part of Lieutenant General Kenneth Anderson's
British First Army until the campaign ended on 13 May. On 15 August Clutterbuck became GOC of the
55th (West Lancashire) Infantry Division, a first line TA formation. ==Post-war==