Welcome to the site
Have you been to the National Archives before and do you have a readers ticket?
http://www.nationalarchives.gov.uk/visit/before-you-visit.htmBest of luck with your rsesarch and enjoy Kew its a great dayout, here are the War Diaries you would need to order for the 7th Battalion.
WO 166 - War Office: Home Forces: War Diaries, Second World War
To see the WD you would need to order
WO166/4454 and so on
WO 166/4454Description:
INFANTRY: 7 Manchester Regiment.
Date: 1939 Aug.- 1941 May
WO 166/4455Description:
INFANTRY: 7 Manchester Regiment.
Date: 1941 June - Dec.
WO 166/8804Description:
7 Manchester Regiment
Date: 1942 Jan.-Dec.
WO 166/12618Description:
7 Manchester Regiment
Date: 1943 Jan.-Dec.
WO 171 - War Office: Allied Expeditionary Force, North West Europe (British Element): War Diaries, Second World War
WO 171/1339Description:
7 Manchester Regiment
Date: 1944 Jan.- Dec.
WO 171/5238Description:
7 Manchester Regiment
Date: 1945 Jan.-July
WO 171/5239Description:
7 Manchester Regiment
Date: 1945 Aug.-Dec.
Roy