we live in Brixton in South london and our 14 m old goes to a former work nursery in Holborn for 3 days/wk. Nice place and he's settled there but the commute on buses etc v tough. From November, we have to move to 4 days/wk. Would people recommend using a local cm for one day/wk? Is it feasible? Or in your experience too disruptive? He's quite sociable and adaptable so my instinct says fine but others have warned against.