The studio where Britain's Got Talent (BGT) is filmed has been evacuated after a Second World War bomb was discovered in north London.

Around 300 homes were also cleared as the Army tried to defuse the device near Wembley Stadium.

Filming of BGT is unlikely to be delayed, but a spokesman for the show said the disruption had "not been great".

The 50kg bomb, dropped during Nazi air raids in the early 1940s, was discovered by builders working near the stadium.

This weekend's Football League play-offs will take place as planned, Wembley Stadium said.

The Army warned of a "genuine risk to life" as homes and businesses, including Fountain Studios, were evacuated.

The BGT spokesman said: "We were just about to start our rehearsal and were trying to build the set when the building was evacuated, so that process has been delayed for the moment.

"We are waiting to hear back from the police. It has not been great, but it is not detrimental at this stage."

Police were first called to the building site on Empire Way, Wembley, shortly before 3pm yesterday, following reports of an unexploded device.

Chief Superintendent Mick Gallagher said: "We are working with the disposal experts and partner agencies to keep disruption to local residents and businesses to an absolute minimum, whilst ensuring the safety of everyone in the surrounding area."

An Army spokesman said: "This bomb is a live munition in a potentially dangerous condition so it's important that people listen to the police and evacuate their homes if asked.

"We will do all we can to minimise the disruption but ask the public to bear with us - any bomb, even under a controlled explosion, could cause significant damage to property and there is a genuine risk to life."

Royal Logistic Corps disposal teams from nearby Northolt and Ashchurch in Gloucestershire have excavated the Luftwaffe Sprengbombe-Cylindrisch general purpose bomb and Royal Engineers have built a blast wall around the site in order to limit an accidental explosion.

"The team is very well experienced. They've dealt with improvised explosive devices in Iraq, Afghanistan and Northern Ireland which are much more complex than Second World War munitions," the Army spokesman added.