“We’re looking at an empty stage at the moment and it’s a real disappointment for people who had been looking forward to the Olivia Dean concert for a long, long time,” Rees said.
At 9.30pm, a stage manager announced the sound at the stadium was being reset.
Rees said the first few songs sounded very good, although Dean’s voice cut out in places.
“The crowd were right into it and singing along and happy, and then just as I say, she said she had to stop. She improvised for a moment, talking about love and her latest album, while people were trying to fix the sound.”
The concert restarted just after 10pm, with Dean apologising to the crowd and saying the show would not be cut short, before launching into a song.