I think the navigation authority is the environment agency (England) for the none tidal bit and Gloucester Harbour authority for the tidal bit (also England?). So my feeling is that it is lawful unser the guidance.
"Activity must respect local restrictions; Paddlers are responsible for checking to ensure that if they are planning to paddle on a licensed waterway, that there are no paddling restrictions in place. We are aware that as of today, the Port of London Authority still has restrictions in place for recreational boaters, whilst the Environment Agency, Canal & River Trust and Broads Authority have now lifted restrictions but are urging responsible paddling (see below). Paddlers must also only use access points and car parks that are open for use."
Paddle now taking pride of place with my MTB. The bracket is an ukele bracket. Thank you for the tips.One of the nicest ways IMO is to find a hazel with a leaning fork - split the main shaft in half so you are left with two prongs sticking out and a flat back to fasten to the wall -peel it and finish it to your satisfaction - easier to draw than explain so if that doesn't make sense I'll try and sketch it