A 40-year-old "mind the gap" recording once heard across the Tube is returning to one station - so the widow of the actor behind it can hear his voice.
Dr McCollum, 65, a GP, met her theatre actor husband - a Rada graduate - in 1992 on a tour to Morocco, after he had left acting and was working for a tour and cruise company.
Dr McCollum said she used to frequently travel via Embankment and loved hearing her husband's voice, even when he was alive.
But after hearing what the voice meant to Dr McCollum TfL arranged for a CD of the recording for her, which she says she listens to.
London Underground director Nigel Holness said: "Transport for London were approached by the widow of Oswald Laurence to see whether she could get a copy of the iconic 'mind the gap' announcement her husband made over 40 years ago.
"We were very touched by her story, so staff tracked down the recording and not only were they able to get a copy of the announcement on CD for her to keep but are also working to restore the announcement at Embankment station."