A violinist has apologised after playing along to another act's track during a Britain's Got Talent audition.
Alexandra Parker impressed the judges with her performance - and her glamourous outfit - on Saturday's show with David Hasselhoff complimenting her on her "lovely string section".
But she was criticised by a member of string quartet Bond who said she simply played along to a recording from one of their albums but at a lower volume.
Musician Eos Chater said: "People often send clips of themselves covering one of our tracks and it's very touching. What I take exception to is a commercial TV show playing our recording, with a musician playing along (not even playing the tune) at a level quieter than our CD. Still, we're glad Bond has got through to the next round of BGT without ever having to appear on it."
Alexandra apologised to her on Twitter, writing: "I'm really sorry, I didn't know what I was doing was wrong - I did play live on BGT and was told it was ok to do this x".
Eos also criticised the show's producers, saying it was "shocking of them" to have allowed Alexandra to play along to their track.
She tweeted: "bgt should help you record a backing track for next round and let you play audibly over that".