Wiltshire Police said officers had attended the leisure complex at Longleat in Wiltshire with ambulance staff on Christmas Eve morning.

"We're in attendance at Longleat Center Parcs near Warminster in support of South Western Ambulance Service following reports of a serious medical incident involving a child shortly after 11am today," a Wiltshire Police spokesman said.

"We will provide a further update when it's appropriate to do so."

Center Parcs UK confirmed the "serious incident" in the Subtropical Swimming Paradise and said it will provide further updates "when it's appropriate to do so."

The Subtropical Swimming Paradise is a water park and includes a wave pool and water slides.