312 • LONDON SIGNALS INTELLIGENCE BOARD
refugees arriving in Britain from the Continent during World War II.
The objective was to identify and isolate any enemy spies attempting
to enter the country posing as refugees. The interrogation process
could take months, and several spies were caught during cross-exam-
ination.LONDON SIGNALS INTELLIGENCE BOARD (LSIB).Created in
1941 to coordinate and supervise signals intelligence operations, the
LSIB is chaired by the chief of theSecret Intelligence Serviceand
is attended by all the directors of intelligence.
LONG, LEO.A Cambridge graduate, Leo Long was recruited as a So-
viet spy during World War II byAnthony Bluntand supplied him
with information fromMI14, where he was an expert on the German
order of battle, using information derived fromultra. After the war,
Long was transferred to the Intelligence Division of theBritish Con-
trol Commission for Germanyand made an unsuccessful attempt
to joinMI5. Later he worked for a film company in London as an
administrator and was named by Blunt as one of his sources to MI5
in 1964. Assured that he would not be prosecuted, Long made a full
confession. He was not publicly exposed as a Sovietmoleuntil 1981.
LONSDALE, GORDON.SeeELWELL, CHARLES; HOUGHTON,
HARRY; PENKOVSKY, OLEG.
LYALIN, OLEG.Born in Stavropol in June 1937, Oleg Lyalin joined
theKGBin the 1950s. His first overseas assignment was to London,
where he was posted underSoviet Trade Delegationcover. Details
of his career, in Department V, were to become known following his
entrapment with his secretary, Irina Teplyakova, in 1971. As well as
running several agents, among themSirioj Abdoolcader, Lyalin was
responsible for planning sabotage contingency plans in the event of
hostilities with Britain. He surveyed the early-warning radar base at
Fylingdales in Yorkshire and prepared a plan to flood the London Un-
derground.
Recruited by a jointMI5–Secret Intelligence Service counterin-
telligenceunit headed byTony Brooks, Lyalin supplied information
from inside the Londonrezidenturauntil he was arrested for drunk