That way when 15 British servicepeople are taken, we can go right in and get them back.

Is this too simplistic? If TomTom can get their solution that fits into the palm of my hand surely we could come up with something smaller like a RFID tag that could be sewn into clothing.
Gary2413…. Well there is something to be said for a man in uniform
And Gary to add… it’s just that this subject is here and now and splashed all over the media!
Good point Auditor 4…. they are coming to kill you now by the way.
I used RFID as an example of size, I realise that RFID doesn’t have the range! I might be a girl but I’m not stupid!