Declassified documents reveal MI5’s secret tips for tailing a suspect
Do not use false beards, carry plenty of spare change for the tube, and if you have to tell a taxi driver to “follow that cab”, be prepared to give him a big tip.
That was the advice issued to rookie MI5 “watchers” whose job it was to covertly follow and report on suspected enemy agents.
The guidance is contained in a booklet issued to all new recruits to the Security Service during the Second World War.
Declassified documents reveal MI5’s secret tips for tailing a suspect