This is certainly a scary notion -- though it may be entirely coincidental. Still, the connection to a senior Labour MP obviously needs to be investigated.

Suicide bomber Mohammad Sidique Khan was given a guided tour of the House of Commons last year - raising the disturbing prospect that Parliament was on the hit list of targets.

Khan, 30, was a guest of Labour MP Jon Trickett, whose wife Sarah is head of a school where the bomber taught.

During the visit in July he also met International Development Minister Hilary Benn, whose constituency includes the school, and was shown areas of Parliament which are off-limits to unaccompanied members of the public.

They included Portcullis House, the new extension where many MPs have their offices and where security has been exposed as worryingly lax in recent years.

More interesting is that the terrorist had been a schoolmate of Truckett's children, and had been a guest in the MPs home, having been known to the family for over 17 years. That makes this development even more frightening.

And then there is this bit.

The Labour Party said Khan's group had been fully screened by the House of Commons Security system and was accompanied at all times throughout the visit.

Do I understand correctly? Were they screened IN ADVANCE? Were there know alarms set off by this individual's activities and associations? If not, why not?