The Rugby Football Union said it is ‘assessing [its] security protocols’ after foolhardy teenage freerunners filmed themselves climbing to the top of Twickenham Stadium.

Police said two men were arrested on suspicion of trespassing on Saturday morning (April 29), just hours before Prince Harry was in attendance at the Army v Navy rugby match.

A clip posted to Youtube this week by Rikke Brewer shows two hooded men scaling the deserted 82,000-seat stadium and walking along the very top of the roof without any safety equipment before performing acrobatic flips on the pitch.

A Met Police spokesman said officers were called shortly before 6am to a report of intruders at the stadium, and arrested two 18-year-old men on suspicion of criminal damage to the pitch.

They were taken into custody and later cautioned for criminal damage.

Mr Brewer told Richmond and Twickenham Times: “It felt incredible to be at the top of Twickenham stadium. The view was amazing. I enjoy doing urbex for many reasons, one being the fact that you never know how insane the view is going to be.”

Urbex, short for urban exploration, involves exploring manmade structures, often abandoned or not usually seen, and often with the aim of capturing striking videos and images of the areas.

The hobby sometimes involves trespassing, but not always.

Mr Brewer has made a series of videos, including one of ‘train surfing’ in Paris, which show a group of people jumping onto the roofs of trains, climbing 194 metres up the Areva Tower, also in Paris, and sneaking into Thorpe Park and climbing the Stealth rollercoaster.

The latest stunt has caused security concerns for the stadium, which Prince Harry visited just hours later to watch the Army v Navy rugby match, as patron of the Invictus Games Foundation, the official charity for this year’s game.

A Rugby Football Union spokesperson said: “We are aware of an incident involving intruders at the stadium on the weekend and are assessing all of our security protocols. Two people were arrested. We are working closely with the police on their investigation."

Got a story? Call the newsdesk on 0208 722 6315 or email calum.rutter@london.newsquest.co.uk.