Is it time to start calling out bad cyclists?

^^ Yeah I appreciate that. I just think of it as the pedestrian owns that piece of road until they reach a curb or refuge. Same way we don't like a taxi cab trying to share a bus lane with cyclists. Perhaps if they had 2-3 metres buffer instead of 1 they wouldn't even notice you.

I pretty much afford most people that section. Once they've stepped onto it, I don't move until they're practically stepping off it, unless it's a hideously busy one where I'll take a chance when they're just about halfway across. Case in point Long Acre/Endell St in Covent Garden.

For us:

you MUST give way when a pedestrian has moved onto a crossing

and

A zebra crossing with a central island is two separate crossings (see pictures in Crossings (18 to 30)).

For pedestrians:

Wait until traffic has stopped from both directions or the road is clear before crossing. Remember that traffic does not have to stop until someone has moved onto the crossing.

https://www.gov.uk/using-the-road-159-to-203/pedestrian-crossings-191-to-199

https://www.gov.uk/rules-pedestrians-1-to-35/crossings-18-to-30