It appears that the undercover agent who foiled an Al Qaeda underwear bomb plot was British:
http://www.bbc.co.uk/news/world-us-canada-18029242
I can imagine a few BNP supporters spitting out their dentures at this news...
Cheers,
Shafique
the message board for Dubai English speaking community
However, as well as reporting that the secret agent was a British citizen, NBC News in the US also says UK intelligence agencies were "heavily involved" in his recruitment.
The BBC's Paul Adams, in Washington, says it is unorthodox for intelligence agencies to disclose details about each others' operations.
If true, the revelations about the undercover agent could raise eyebrows in UK intelligence agencies, he adds.