Firstly, please could you remove the commercial link in your signature, as it consistutes unauthorised advertising.
Secondly, IF you have enough bandwidth where you are, then it's really simple to just use an ssh server as a socks proxy. Install Putty on their windows machines, and configure a profile to ssh to your UK based system - probably using a shared key to avoid having to enter passwords each time. enable a dynamic port redirect in there, and that will cause putty + openssh to act as a socks proxy, with zero configuration on your side, assuming you have an internet accessible ssh implementation already. then they just connect to whichever local port on their machine, and woosh, straight through.
There are other alternatives though... have you looked at Zatoo?
Last edited by acid_kewpie; 02-03-2009 at 10:05 AM.