A hard-hitting film by actor Ross Kemp accuses London Mayor Boris Johnson of lying about the effect of Fire Service cuts in the capital.
The film Every Second Counts says fire deaths in London are increasing, not decreasing as Mr Johnson claims.
It also asserts that Mr Johnson lied over response times and levels of cover.
Mr Kemp has now joined the fight to save 10 London fire stations.
He said that “London is not safe in Boris Johnson’s hands” and slammed the Mayor for breaking pre-election promises not to cut the fire services.
“Before Boris Johnson was re-elected in 2012 he promised there would be ‘absolutely no reduction in fire cover’ if he won and within a few months, without any shame, he announced the cuts,” said Mr Kemp.
“Boris cannot seriously tell us that closing fire stations won’t put people’s lives at risk.”
The film, released yesterday, shows a living room in flames and warns firefighters will not be able to get to fires as quickly if the cuts go ahead.
London Fire Brigades Union regional secretary Paul Embery said: “Ross’s film will be very uncomfortable viewing for Boris Johnson.
“We are asking everyone who is angry and worried about the fire station closures to get involved in our campaign and sign the petitions against the closures.”
Along with the 10 station closures, 580 front-line fire-fighters’ jobs will be axed if Mr Johnson’s plans are implemented.