The landowner uses a digger to block off the tunnel entrance to an old quarry lake with tonnes of slate.Read more
The owner closes the access tunnel to the quarry in Gwynedd, saying "enough is enough".
Barrie and Dave, in their 80s, are the last volunteers on a Leicestershire waterway.
Leighton Ollerenshaw says he wants to help 'the next generation' to have a colourful world.
Police were called to the site near Corfe Castle in Dorset where people had gathered for the illegal rave.