‘Absolutely insane’ is the verdict of Penny Mordaunt MP on the Welsh government’s introduction of a 20mph speed limit on residential roads. Having driven along not a few residential roads in Welsh towns and cities earlier this year, I can only agree, with one caveat. There are quite a few places in Wales, and not just in Wales, where the combination of narrow roads, parking and other traffic makes any thought of reaching even 20mph optimistic.