Signs, more speed humps, removal of centre line and road narrowing. Given the zero enforcement of 20 mph zones this seems a lot like a net loss for cycling comfort.
Why is there no enforcement of 20mph zones? I'm always copping abuse from motorists for riding at 20mph (tbh normally >20mph) and taking the lane. Motorists normally then close pass me and speed past the speed cameras. Are any of those cameras actually operational?
TfL have a consultation open over making all their roads (i.e. red routes) 20mph...
https://consultations.tfl.gov.uk/streets/20/
Edit: On closer inspection it's limited to central London, so not as significant as I first thought.