It looks like the Sunday Telegraph have been caught out at playing at spooks. Apparently, one of their journalists, Tom Harper, used his middle name to try to con UKIP into thinking he was one of their supporters.
One minor mistake though is that he apparently left his real name on his voicemail and used his real email address. Apparently UKIP are considering reporting the incident to the Press Complaints Commission.
Whoops! First rule of espionage, build yourself a decent legend!