Britain's Got Talent faces miming accusations from viewers after St Patrick's Junior Choir semi-final performance

Before the first performance on Britain's Got Talent had even begun there was a hefty dose of controversy when St Patrick's Junior Choir had to re-start their performance.

As the backing track for their version of Katy Perry's Roar started playing, Ant and Dec rushed onto the stage and called a quick end to the song. Then what sounded like a backing track featuring the kids' vocals could then be heard, leading viewers to quickly accuse the show of miming.

https://twitter.com/markr1chards/status/869262710206279680
https://twitter.com/LJay815/status/869261969009901569
https://twitter.com/Ben__Taylor96/status/869261754647359489
https://twitter.com/KGower83/status/869261968317853697
https://twitter.com/sophieaiken/status/869261972050767874
https://twitter.com/Mike29th/status/869261972801499137

#BGT Oops. St. Miming Choir ?

— kieran? (@KieranRhodes_) May 29, 2017

However, a spokesperson for Britain's Got Talent denied they were miming and told RadioTimes.com: “A technical glitch meant that the wrong song was played at the start of St Patrick’s Junior Choir performance as well as some vocals recorded during a rehearsal from them.

"The choir did not mime and we are very proud of their performance.”

After the song, Ant said "Bit of a sound issue there. They couldn't hear the track so we let them start again."

David Walliams said that the choir's performance was "fantastic", while Simon added: "What was making me laugh is that I know the chaos that was going up in the gallery when this was going wrong and you were so calm."