The most famous of Brits.
James Bond 007,
British, secret agent, of Scottish & Swiss parentage.
Mrs. Emma Peel(The Avengers)
British, dilettante secret agent, partner to John Steed
John Steed(The Avengers)
British, secret agent
The Prisoner
British, former British secret agent?
Sherlock Holmes
British, pioneering consulting detective
Mr. Lee(Enter the Dragon)
Chinese, Hong Kong, British subject, Kung Fu master
Mrs. Emma Peel
http://en.wikipedia.org/wiki/Emma_Peel
James Bond
http://en.wikipedia.org/wiki/James_Bond
Mr. Steed
http://en.wikipedia.org/wiki/John_Steed
Simon Templar aka: The Saint
http://en.wikipedia.org/wiki/Simon_Templar
I prefer Basil Fawlty myself.