Nathaniel Mayer Victor Rothschild

 Victor Rothschild, a member of the famous banking dynasty, was born in 1910. A talented scientist, Rothschild joined MI5 during the Second World War. This included working with Arthur Koestler to produce anti-Nazi propaganda. In 1940 Rothschild suggested that Anthony Blunt should be invited to join the secret service. He also rented a house to his friend Guy Burgess.

After the liberation of France Rothschild worked with Dick White, Kim Philby and Malcolm Muggeridge at the MI6 offices established at the Rothschild family mansion in Paris.

In 1961 Rothschild passed on information to Arthur Martin that Kim Philby had tried to recruit Flora Solomon, as a spy in 1937. Rothschild also worked closely with Peter Wright and is believed to have supplied him with information that suggested that Roger Hollis was a Soviet spy.

Edward Heath was a great admirer of Rothschild and in 1970 he appointed him head of the government's Central Policy Review Staff. It was later claimed that Rothschild persuaded Heath to appoint Michael Hanley as Director General of MI5 in 1972. Later Margaret Thatcher appointed Rothschild as her unofficial security adviser.

Victor Rothschild died in 1990. Four years later, Roland Perry, published The Fifth Man, where he unconvincingly claimed Rothschild was one of the Cambridge Spy Ring (Kim Philby, Donald Maclean, Guy Burgess, Anthony Blunt and John Cairncross).