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The Llangollen International Eisteddfod said it was forced to cancel the concert, by Welsh musician and composer Karl Jenkins, but said the festival would resume on Thursday morning.

"The Llangollen International Eisteddfod takes the safety of its audience, competitors, performers and volunteers extremely seriously," it added.

The Welsh Ambulance Service confirmed the patients were taken from Llangollen International Eisteddfod in Denbighshire to Wrexham Maelor Hospital with flu-like symptoms on Wednesday.

Millar was speaking at the start of the party's conference in Llangollen.

She picked up her Anorak of the Year award in a ceremony in a pub near Llangollen.