Britain's zoos should shut down, says Damian Aspinall

Damian Aspinall - the owner of Howletts and Port Lympne wild animal parks in Kent - says Britain's zoos should shut down and animals returned to the wild.

He says: "We have no moral right to let animals suffer just because we are curious about them."

But other owners say they're good for conservation and education - and releasing animals can be cruel and irresponsible. Andy Dickenson reports.