A school has been banned from a zoo for two years after a group of children decided to moon at monkeys.

The 14 and 15-year-olds from Radclyffe School in Chadderton, Greater Manchester, were kicked out of Chester Zoo during a school trip.

There were around 300 GCSE pupils from year 10, but as a result of the actions of nearly children, they all had to get on the buses and go home.

The zoo said that 29 pupils were involved, but headmaster of the school Hardial Hayer disputed this saying that only 24 children took part.

Officials at the park said they had no option but to enforce the ban on the entire school taking trips there in future. The ban will last until 2015.

Some pupils bared their backsides at the monkeys, while others hurled food at them and it is alleged that there was also damage to property.

A zoo spokesman added: ‘We welcome schools to the zoo on the understanding that the students behave in such a way that does not cause problems for their fellow pupils, other visitors, the animals or staff. Fortunately incidents of this nature are extremely rare.’

The trip took place on Thursday last week as part of the school’s end of term activities.

Chester Zoo is one of the most popular zoos in the country with more than 1.4million visitors every year.