Archive (TNA)
Prime Ministerial Private Office files

Cold War: Secret Intelligence Service letter to Charles Powell ("Gordiyevskiy") [CIA director Casey calling on MT, 27 Spt; Gordievsky's information on US-Soviet relations, renewed arms talks] [declassified Dec 2014]

Document type: Declassified documents
Source: PREM19/1647 f18
Editorial comments:

The reference C/6058 implies that this letter originated at the highest level of the Secret Intelligence Service ('MI6'). Read other documents selected from this file. The full file from which this item is taken can be seen here.

Importance ranking: Major
Word count: 5pp
Themes: British relations with the Soviet Union, Foreign policy (USSR & successor states), Defence (arms control), Security services & intelligence