I’ve got a Cooper D hatch which was bought to use as a city car alongside my RR Vogue, and I have now sold the Vogue and just run the Cooper D! It’s brilliant fun to drive, has been 100% reliable, does 50mpg quite easily and is c charge exampt and easy to park in London. Can get either of my bikes in the back easily with the back seats down and both wheels off.
Great cars – the clubman is usefully bigger – my sister has a Cooper S Clubman and loves it.
Dogs and kids might be a squeeze at the same time depending how big the dogs are as the boot is pretty small with the seats up. A countryman might be a safer bet although I’m not sold on the looks and the fact that it isn’t at all mini!