‘A clever agent’: notes from ‘watchers’ of spy Kim Philby made public for first time

A new exhibition at the National Archives in London will reveal the extent of MI5 operation to expose the British double agent who was also Observer reporter

Secret surveillance of Britain's notorious double agent, Kim Philby, made public for the first time in archived documents, reveals how keenly the Security Service wanted to confirm or disprove early suspicions of his high-level treachery.

In daily bulletins submitted to MI5 in November 1951, undercover operatives describe how Philby, codenamed Peach, moved about London.