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EMBASSY WARS 187
There were other attempted meetings around south-west
London at which MI5 thought Kuznetsov was even more aware
of surveillance. Marshall was also developing his fieldcraft, and
on one occasion he artfully evaded his MI5 tail by boarding an
underground train at Euston, then jumping off just as the doors
closed. 8 MI5 had to accept that the pair had probably managed
several meetings they were unaware of, and wondered what
secrets Marshall was handing over.
On 10 June it was decided to arrest the pair at their next
meeting, in the hope that they would be in possession of
compromising dccuments, which would make a prosecution
easier.9 The next day, Anthony Simkin from MI5 spoke with
Colonel Ted Maltby, the deputy head of DWS at Hanslope Park.
They knew Marshall was about to go on a few days' leave in
London, and Simkin asked if the DWS could 'put out a document
that would appeal to Marshall'. As bait, they chose a
booklet giving new DWS frequencies and call signs. 1O On 13
June Marshall and Kuznetsov were arrested by Chief Inspector
Hughes of the Special Branch as they met in a park in
Wandsworth. They were taken to Wandsworth Police Station,
and there was delight all round as they proved to be carrying
a wealth of incriminating material, including the deliberately
proffered frequencies booklet. Kuznetsov was supposed to enjoy
diplomatic immunity, but in their excitement the police did not
listen to his protests and put him in a cell to cool off.
On 15 June, Dick White went in person to Chartwell, Winston
Churchill's private residence, to brief him about the case. The
Prime Minister was recovering from illness, and received White
in his pyjamas, sitting up in bed. White emphasised that this
was not an isolated case, and that MI5 knew the Soviets had
been 'very active in regard to British personnel in our Mission
in Moscow'. He explained that when Kuznetsov was arrested
he was found to be carrying a notebook 'in which were entered
the index numbers of the cars used by our shadowing organisation',
which the MI5 watchers believed showed his status as
a 'professional espionage agent'. 11