Help with War Service of Father-in-Law

[Teltheone]

I have over the years found and constructed Family trees for my Fathers and Mothers family back to approx 1852.

But for my Wife's family, I have found where her Mother born and lived in London as a child.

But her Father, the family has no idea of his army details only that he was a driver in army and said to have served in Europe, North Africa, Italy and Israel during WWII and discharged late 40's.

How can any records be found when I or we don't know his Regiment or army number to search.

thanks

[nanny jan]

This might help:  https://www.gov.uk/get-copy-military-service-records