The reverse of public sources and my error in not posting before today.

Nigel Inkster, ex-No.2 at SIS, in an article in 'Survival' a year ago made an interesting comment on the role of US intelligence in all UK CT investigations:
Referring to the USA acting as 'counter-terrorism collector of first resort to the international community. Of the many plots that Western European services disrupted between 2001 and the present, there was none which did not benefit from game-changing US intelligence....there is no doubt that the US did more to make Europe safe from terrorism that Europe was able to do for itself'.
From: 'In 9/11/11: A Decade of Intelligence', Survival December 2011-January 2012, pgs. 5-12 (quote pg.10).