Posted: 08/08/2015 at 11:57
Barry Island, thank you for going to so much trouble to source the information and post links, I agree this does look like a good idea.
Runnybreak, I have no problem with your idea as long as the final height (when sunken) is still 2.4 metres. Could you confirm this please? as I assumed it started at 2.4 then got sunken by at least 40cm Thanks