A school has urged parents to make sure their children do not visit a dangerous quarry to swim amid reports groups of pupils are planning to head there this week. 

Lord Williams's School in Thame has issued an urgent warning to parents that some pupils are reportedly planning to head to Chinnor Quarry on Wednesday evening for a swim. 

The quarry may look like a beautiful place to spend a sunny day, but it is private land and swimming in the water is "extremely dangerous", police have warned in previous years.

There is a possibility the flooded quarry is contaminated and could cause illness and skin irritation, as well as reports of large machinery hidden under the water, steep drops, chemicals and animal excrement that make it unsafe for the public. 

The quarry, which is privately owned and therefore not open to the public, was overwhelmed with visitors in June 2020 at the height of the pandemic, despite urgent warnings not to go there. 

On Monday morning, Lord Williams's deputy head teacher Karen Vear wrote: "We have heard there is a possibility that some of our students may be gathering at Chinnor Quarry on Wednesday afternoon/evening to go for a swim.

"Please note the quarry is on private land and swimming in the water is extremely dangerous.

"The police have previously sent out warnings that the quarry water is highly toxic and could cause illness and skin irritation.

"In addition, the water has sudden drops and large machinery at the bottom which could cause significant damage to people entering the place.

"Please talk with your child/children and make sure they do not visit Chinnor quarry and that they stay safe this summer."

The warning came the same day a 16-year-old boy tragically died in Bray Lake in Maidenhead after he got into difficulty in the water.