A former Paralympian brought chaos to London City Airport after he managed to climb on top of a plane to prevent it from taking off, as the police have been left facing questions over security concerns.

James Brown, a visually impaired athlete who won a bronze medal at London 2012, was able to pull himself onto the roof of a stationary British Airways plane that was due to fly to Amsterdam on Thursday.

The UK's most senior police officer Cressida Dick branded his actions "reckless, stupid and dangerous", as she confirmed that a security review will be conducted into how he was able to carry the stunt out.

"These protesters have shown they are determined to go where they can, when they can, occupy what they can and disrupt whoever they can, frankly,” she said.

Mr Brown, who was later arrested for endangering an aircraft, was even able to live stream his actions on social media, telling his followers: "This is all about the climate and ecological crisis. We're protesting at government inaction on climate and ecological breakdown.”