The authorities know that it is actually impossible to try stop people of all ages jumping into water, whether it be lakes, rivers or the sea, (especially when the weather is hot and sunny).

Obviously there is a risk in doing so and occasionally tragic incidents do result.

I have been asked to publicise this information about water safety in the hope that it helps :

https://www.hampshirescp.org.uk/parents-and-carers/water-safety/