BBC Breakfast studio erupts in hysterics as Kevin Sinfield relieves himself live on air

This is the hilarious moment BBC Breakfast cut to marathon runner Kevin Sinfield spending a penny during a live broadcast.

Presenters Charlie Stayt and Rachel Burden shared awkward glances after the rugby legend sloped off track to urinate on the side of the road.

Charlie said: "We have a camera on board a bike which is following... we set him off every morning and we don't really know how it works apart from..."

Then in perfect timing Kevin took a toilet break in front of the live cameras.

Thinking on her feet, Rachel added: "Now we know how it works."

It was unfortunate timing during the live broadcast (BBC)

Former Leeds Rhinos captain and rugby legend Kevin is taking part in an ultra marathon to raise money for Motor Neurone Disease awareness.

Kevin's close friend and teammate Rob Burrow revealed he was diagnosed with MND in December 2019.

Kevin has taken on the challenge of running seven ultra marathons in seven days with the plan to raise £777,777 inspired by Rob and his playing number, seven. Sinfield is running from Edinburgh to Manchester via Melrose, Newcastle, Middlesborough, York, Leeds and Bradford.

He began on November 13 and is aiming to reach Old Trafford for the halftime whistle at the Rugby League World Cup men's final on Saturday, November 19.

He left the road just as the camera cut to him (BBC)

A tweet from the official Leeds Rhinos twitter page showed cheering crowds in York, huddled together in the rain to watch Sinfield arrive for the first time in North Yorkshire.

It was captioned: "Thank you York, simply incredible."

"On his fundraiser, Kevin said: "This is taking the word challenge to the next level – but it still doesn’t even touch on the challenge which people with MND face every day.

Kevin quickly carried on with his journey (BBC)

"And that’s why I’m doing it. Inspired by Rob Burrow, Doddie Weir, Stephen Darby and other people living with MND, the money raised will support the fight against MND.

"I’m proud to be supporting five charities with this challenge, charities which support people affected by MND and invest in research taking us closer to effective treatments and a cure for the disease.

"The MND Association will receive 41% of the money raised to be spent on research projects to take us closer to a world free from MND."