The ex-editor of the left-wing Tribune newspaper, Richard Clements, has died at the age of 78.
Mr Clements was also an aide to Michael Foot when he was Labour leader and his successor Neil Kinnock.
Mr Foot described Mr Clements as "a very fine journalist and a splendid chap in every way".
He edited the left-wing newspaper Tribune from 1960 to 1982. In 1999 he was named by the Sunday Times as being a spy - a charge he strongly denied.
He dismissed the accusation as "complete nonsense", saying Tribune published a lot of anti-Soviet articles.
Of his time with the Labour leaders, he was once described as "Kinnock's closest ally and a shaper of Labour's strategies".
Mr Clements died in a nursing home in Barnet, north London, after a long illness, his family said.