276 British Spies
The website Cryptome has a list of 276 MI6 agents:
While none of the 311 names appeared on all three lists…35 names appeared on two lists, leaving 276 unique names.
According to Silicon.com:
It is not the first time this kind of information has been published on the internet and Foreign Office policy is to neither confirm nor deny the accuracy of such lists. But a spokesman slammed its publication for potentially putting lives in danger.
On the other hand:
The website is run by John Young, who “welcomes” secret documents for publication and recently said there was a “need to name as many intelligence officers and agents as possible”.
He said: “It is disinformation that naming them places their life in jeopardy. Not identifying them places far more lives in jeopardy from their vile secret operations and plots.”