Campaigners fighting to stop ash from Didcot Power Station being disposed of in a lake have delivered a childrens' petition to Downing Street.
Thousands of people have signed the petitions against RWE Npower's plans to fill in Thrupp Lake at Radley, Oxon.
They were put together by primary and secondary schoolchildren in the Abingdon and Radley areas.
The handover took place as a public inquiry into whether the lakes should have village green status goes on.
Npower, which is fighting the application, said it would be responsible in disposing of the ash.