The Thais would like to have a long chat with him too, and given the choice between his spending time in polite British custody or with them the latter would be much more satisfactory. Considering his youthful activities turning in fellow Jews to the Nazis Mossad may have dibs as well. Some of all those billions have clearly ended up in just the right sets of pockets.
I just did a casual Google search on him, looks like his name is basically mud in all sorts of places around the world.