Sorry hopefully posted by me now 😀
Thanks for all the replies
It is the great River Ouse, we have lots of boats that are permanently moored along the banks so I assume no major issues.
The river obviously rises and falls albeit not to the extremes of other rivers as stated above
The EA are particular about anything being driven into the riverbed not the boat, I have to apply for a permit to install any poles etc into the riverbed.
I am considering a bank install solution; at low water level the boat is still able to sit close to the bank, so I am considering a landbased pontoon that will sit on the ground at a minimum point and then rise with the river on land based scaffold poles.
With regards to planning we have in excess of 50/100 liveaboard boats with their own land using the riperian rights law; it would seem a few cases Moore vs the British waterways being one, set a precedence for mooring against the land that you own (owning the land is critical) that a riperian owner is not committing a legal wrong, so therefore you are entitled to do so.