Al Qaeda Trying to Place Moles in British Intelligence

From the Daily Express:

Dozens of suspected Islamic fanatics have been weeded out after attempting to join MI5 and MI6.

They were identified by the vetting process applicants go through over six to eight months.

The success in exposing the moles has underlined the dangers faced by the security services as they seek to recruit more Muslims.

Assuming that most of these would be Mohammed Philbys are British citizens, wouldn't trying to penetrate British intelligence agencies be considered treason? The article doesn't mention any arrests. Are they simply being let go to toddle back off to the nearest extremist mosque?

And how many of these mutts are applying to (or already working at) the FBI or the CIA?

Thanks to Dr. Rusty Shackleford of The Jawa Report who got a tip from "Lucky."