Most London Underground platforms use the same recorded warning to mind the gap between the train and the platform edge. On the northbound Northern line platform at Embankment, the voice is different. It belongs to Oswald Laurence, an actor who recorded the announcement around the start of the 1970s and died in 2007.
It is still there because his widow asked for it.
Where Mind the Gap came from
The recorded phrase was introduced on the Underground in 1969. According to the London Transport Museum, the first version was voiced by a sound engineer, Peter Lodge, after an actor who had been approached wanted to be paid royalties every time it was played.
Other voices were recorded over the following years. Laurence’s version was used on the Northern line.
A widow on the platform
Dr Margaret McCollum, a GP, was Laurence’s widow. After his death she would go to Embankment station to hear his voice on the platform, she told reporters in 2013.
In November 2012 the recording stopped, replaced by a standard announcement when a new public address system was installed. McCollum wrote to Transport for London to ask whether she could have a copy.
TfL staff found the original recording, gave her a copy on CD, and in March 2013 put Laurence’s announcement back on the northbound Northern line platform at Embankment. The story was reported by the BBC, The Guardian and the Associated Press.
Is it still there?
In a freedom of information response in 2025, TfL confirmed that it still holds the Embankment recording.
Key dates
- 1969: Mind the Gap is introduced on the Underground
- Around 1970: Oswald Laurence records his version
- 2007: Laurence dies
- November 2012: his recording is removed at Embankment
- March 2013: TfL restores it after his widow writes in