Sixty members of a Welsh children's choir were treated by paramedics after they began vomiting on a flight from Dubai to London.
The children, aged between 10 and 14, were returning from a performance when were taken ill on the flight.
Twelve children were taken to Hillingdon Hospital in West London for treatment but were later discharged.
The children from the Wales-based Only Kids Aloud (OKA) sang at a concert in Cape Town, South Africa, with opera star Bryn Terfel.
On their flight home on Sunday some of the children suffered from "diarrhoea and vomiting".
The hospital said it was likely they picked up a bug before they left Cape Town. Bet Davies, from the Wales Millennium Centre, went to South Africa with OKA and was on the flight with the children.
Our medics checked over 60 children & took 11 to hospital after they were taken unwell on a flight to Heathrow this morning.
- London Ambulance (@Ldn_Ambulance) May 5, 2014
She said: "The ambulance came to check the children over as a precaution to make sure they weren't bringing an infection into the country.
"The children had the most amazing experience on their trip.
"They did two major performances, one on Friday and one on Saturday with Bryn Terfel. They were on a massive high after Saturday night, but on the flight home some of them fell sick and were running to the toilet.
"There had been a bit of turbulence and some of the children had never flown before.
"They are all okay now though and have been discharged from hospital."
Thanks for all your well wishes. Pleased to report we are now all on the buses heading back to Wales..... pic.twitter.com/RJinw3gQhw
- Only Kids Aloud (@OnlyKidsAloud) May 5, 2014
The choir, Terfel and Cape Town Opera's chorus performed a new piece by royal wedding composer Paul Mealor at two concerts at the Artscape Theatre Centre on Friday and Saturday nights.
It was part of the Africa-UK arts and culture season to mark the 20th anniversary of the end of apartheid rule and the establishment of democracy in South Africa.
Bet their parents will be pleased to see them!
More on Parentdish: School trips - character building or just plain terrifying
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