Rare tropical frogs rescued from a killer fungus in the Caribbean have produced a bumper brood in the UK.

The two female mountain chicken frogs responsible for the 76 new additions are part of an attempt to rescue the species from extinction.

All 12 frogs in the UK breeding programme came from Montserrat, where the chytrid fungus has ravaged the population.

"We're absolutely chuffed to bits," said herpetologist, Dr Ian Stephen.