Most modern cars have speed limiters you can adjust on-the-go. By modern I mean made in the last five years or so.
No excuse for speeding.
If there’s a question of how appropriate a speed limit might be, that’s still not an excuse for speeding - that’s grounds for presenting a case to the local authority and campaigning for change via the legal route.
Residential street speed limits (20mph, 30mph) have to be the most poorly followed laws in the UK.
Edit to add: more expensive cars have had this feature for even longer; operating a vehicle within a given speed constraint with or without technology to help shouldn’t be hard for a competent driver. So: why the downvotes?