With reference to German POWs working on farms I know of one German (Downed Luftwaffe) who worked on a farm near Lichfield whilst detained. He became involved then married the farmers daughter. Subsequently they inherited the farm and he prepared a strip for light a/c.
Shenstone. Later on moving to Catthorpe I learned of further German & italian prisoners working on local farms, one of whom taught one of my customers (now 75) how to tie a young pigeon with string to its leg whilst in the nest so that it could be harvested when fully grown, as fully grown but tender meat.

Apologies to veggies or other non combatants!!

My father made friends with an Italian POW (he was captured in the desert campaign) who worked on the farms around Devizes, Wiltshire. We went out and stayed with him in the 1960’s and regularly we would receive food parcels at Christmas containing a Parmesan Wheel and Italian wine, his Son in the 1970’s and later his grandson in the 1990’s came over to stay with us to improve his English after his University studies.