This is the warship that Royal Navy Lt. Cmdr. L.K.P. "Buster" Crabb was investigating on behalf of MI6 when he disappeared in 1956, right around the time this picture was taken: Lionel Crabb - Wikipedia
The caption of this pic is : Sovjet light cruiser ORDZHONIKIDZE visiting Copenhagen, Denmark from August 1 to August 8 - 1956
Klaatu83 said : … right around the time this picture was taken.
My money : This picture was probably taken during a visit of the soviet cruiser in Copenhagen … but according to Peter Wright in his book Spycatcher (1987), MI6 recruited Crabb in 1956 to investigate the Soviet cruiser Ordzhonikidze’s propeller, a new design that Naval Intelligence wanted to examine. On 19 April 1956, Crabb dived into Portsmouth Harbor and his MI6 controller never saw him again.