Spy in Parliament?

So MI5 have found out that a parliamentary aide was, in fact, a Russian spy. Her employer Mike Hancok, MP for Portsmouth, says:
 “I have no reason to believe she did anything but act honourably during the time she was working for me.”
Errr... no shit! What would he expect? Does he think that spies have T-shirts with “Talk to me I’m a spy”? Of course he’d have no reason to suspect her, she’d be a pretty crap spy if he had, or he’d be criminal if he knew and employed her anyhow.
Reminds me of the Monty Python sketch “Secret Service”:

Interviewer: Why do you want Secret Service?
Mr Leyton: Ah I thought it would be...
Interviewer: Why do you want Secret Service?
Mr Leyton: Well...
Interviewer: Can you keep a secret?
Mr Leyton: Yes.
Interviewer: Good, well you're in then, well done, well done now. One small thing I noticed back here, where are we? Ah yes, your middle name Olbalinskavichski, not Russian are you?
Mr Leyton: Yes.
Interviewer: You are Russian.
Mr Leyton: Yes.
Interviewer: Well that's no good we don't want Russkies in the secret service, it wouldn't be secret, out you go then.

Come on Mr Hancock! Do you honestly think that MI5 would have acted purely on a whim? They must have had enough evidence in order to act and no, they are not obliged to let you see the evidence. You are merely her employer and, let’s face it, you got turned by a pretty face and a sexy accent.