Footage has emerged showing a gorilla venting his frustration at not being allowed inside by jumping on his son at Twycross zoo, England.

The video shows the silverback gorilla peering into his locked indoor enclosure before taking his aggression out on the smaller primate, who was unhurt in the incident.

The filmer later explained that the gorillas were agitated as their indoor enclosure was being fitted with a new climbing frame, preventing them from wandering as freely as usual.