I'm in Canada and so if a Brit were to download and run the code TOO BAD!
Actually.... Look at Dotcom - no crime under either NZ or US law but....
There's at least a few international laws you could be charged under, after all according to Dudd your software would be aiding crims, paedos and worst of all terrorists!!!!1!!1!!1!!!!!1!1!1!1!!!!!1!1!!!!!1!1!!!
(Btw are you somehow related to Bob or Charles? :-) )