Two rare tiger cubs have appeared in public for the first time.
The five-month-old Amur tigers - Kazimir and Arina, have been hand-reared from birth at Howletts Wild Animal Park, near Canterbury in Kent.
Mr Warren said: "These cute cubs had a hard start in life, as their mum left them alone.
"We made the decision to hand-raise them so that they would get the nutrition and care that they needed.
"This involved hand-feeding them both at two-hourly intervals, constant supervision and regular medical checks by the on-site vet team at the wild animal park.
"It's great to see them doing well - they've both got huge characters."