Completely coincidentally, someone literally just shared this with me. Haven't listened to it yet but definitely will.My starting point was actually the book 'Collar the Lot' by Peter Gilman which I read some time ago and would recommend to you.
BBC Radio 4 - Archive on 4, Collar the Lot
Tom Conti explores the story of Italian internment in Britain during World War II.
www.bbc.co.uk