Low Traffic Neighbourhoods, or LTNs, reduce traffic in residential streets, and improve access for pedestrians and cyclists with dedicated lanes, wider pavements and planters blocking off vehicle access.
Speed limits of 20mph are designed to reduce the severity of injuries suffered in accidents.
I’ve actually taken to only doing 20mph in residential areas anyway. Kinda makes sense around streets where you don’t know whether kids or animals will just run out into the road.
As any sensible person would.
Even if it’s only because you don’t want to damage your car you be careful wouldn’t you?