For more info on German prisoners of war in the United Kingdom, see the Wikipedia article that I have contributed to: https://en.wikipedia.org/wiki/German_prisoners_of_war_in_the_United_Kingdom
Much of the information appears in my book, Hitler’s Last Army, (though not necessarily in exactly the same format). Like all Wikipedia articles the above is subject to further editing and revision by contributors. In setting out the basics, I’ve provided a framework for future additions and amendments.