@Codetapper: Did you ask Rob Northen whether or not he copylock'ed Putty Squad? That would be a way to find out if there actually was a master copy of Putty Squad or not.
According to Linkedin, John Twiddy is still "head of development" at System 3. I think it is Twiddy we need to talk to to get closer to the truth. System 3 offices are right in the middle of London... maybe we really just need somebody who drops in there and tries to get a definite answer. Or camps out until Twiddy explains to him what happened to that mysterious DAT streamer with the Putty Squad files..