Andrew said it was not until 1971, when 100 Soviet diplomats were expelled from Britain, that MI5 contained KGB and Soviet bloc intelligence activities in the UK.
The book ends 100 years of seceracy of the British counter intelligence agency during the two World wars, the Cold war and the current fight against terrorism.
Andrew was given access to all 400,000 files created by MI5 since it was founded in 1909 with no limitations on what he could publish.
Andrew said documents also showed MI5 was under pressure from the then prime minister Baroness Margaret Thatcher to help her in industrial disputes, such as the miners' strike.
Her demand was resisted because they were not genuine subversives, the book says.

More News:
Market Updates |
Stock Alerts |
All Trading News |
Stock Index