There are a few studies indicating that the bed of the river is aggrading and that there is an increased flood risk. Certainly, at Cheam itself, on its second reserve, it has encountered exactly that problem. Some of the channels have filled up and their second reserve has been threatened with flooding.
I don't think there's a dispute that there's a flooding issue and that something is going to have to be done about it. It's a question of how it gets managed and the choices that are made between dyke raising, the timing of certain gravel extractions, and such like that.