Here's a fascinating Quora post about equipment captured from the Argentines in 1982, some of which is still used.
I like this quote:
"Gurkhas captured a Argentine officer’s Mercedes jeep. They gave it to a British Army unit who persuade the RAF to bring it back to their base in Germany where it was used as the base run about for several years, until the battalion was brought back to UK. There tried to register it with the DVLA but it had no paper work. They contacted Mercedes who discovered the Argentine military had never paid for it, so asked for the money or for it to be returned.
I think the reply was along the lines of “ well, you can try and come and get it” "