Is it time to start calling out bad cyclists?

Seems odd to have a Toucan feeding a footway & not shared use path so will raise this with the council.

It depends on the traffic order that's in force. There may well have been signs at one point that were removed by people working on something else or simply stolen/vandalised. Look in the surrounding shrubbery. :) In my experience, what is unusual is a council forgetting to put them up in the first place.