I am researching Cpl Leonard John Stone [4076077] of Brithdir who died on 19 Jan 1941. Details on CWGC state: Monmouthshire Regiment Unit: 4th Bn Secondary Unit: Corps of Military Police Unit: attd Cpl Stone's funeral was a military one and he is buried in the local cemetery. Can someone please tell where his unit were on 19 Jan 1941 and explain the 'secondary unit'? Regards Roy