"Mind the Gap" - three little words that most Londoners barely notice anymore.
But for Margaret McCollum that simple instruction on the underground has a very personal meaning. It was the voice of her late husband Oswald Lawrence.
Robyn Dwyer explains:
More top news
An appeal to support the family of murdered policeman Keith Palmer has reached more than £700,000 in two days.
PC Keith Palmer will be remembered permanently at the National Memorial Arboretum, Home Secretary Amber Rudd has said.
ITV News rounds up the best pictures of the day as campaigners make a final stand before Theresa May triggers Brexit on Wednesday.