Suzy Lamplugh, 25, disappeared in 1986 after leaving her offices in Fulham, west London. Her body has never been found but she was officially declared dead in 1994.

A man was arrested in 1989 but never charged.

Wright and Miss Lamplugh worked on the QE2 in the 1980s. Wright was a steward and Miss Lamplugh a beautician.

And the Metropolitan Police said the Lamplugh inquiry was on-going.

A spokesman said: "We are not prepared to discuss who we may or may not wish to interview in connection with any on-going investigation."

But earlier Detective Chief Superintendent Stewart Gull, who headed Suffolk Police's prostitute murder inquiry, said there was nothing to link Wright to other murders or disappearances.

Miss Lamplugh's 76-year-old father said the police have been in regular contact with him since her disappearance and had mentioned Wright's name before.

Paul Lamplugh, of Mortlake, west London, told the Daily Telegraph: "The last time they were in touch was just before the trial started. They certainly haven't ruled anything out, and I know they have been in touch with Suffolk Constabulary."

Miss Lamplugh vanished in July 1986 after going to show a house to a man calling himself "Mr Kipper". Her body has never been found, despite searches in Worcestershire and in Somerset.