Sorry for the slow reply. We don't see our grandson every day so we have only just tried a pushchair. We found a Mothercare Nanu pushchair did not fit because the boot was too narrow. We had to fold the rear seat down to make it fit. It' probably would have fitted if we had taken the parcel shelf out. This type of pushchair is a small portable one that people often buy to take on holiday when travelling by air. I have recently read a Car magazine review of the F55 where the reviewer found the same problem.
http://www.carmagazine.co.uk/car-reviews/mini/mini-five-door-hatchback-2014-review-we-test-mini-5dr/
http://www.mothercare.com/Mothercare-Nanu-Stroller/LR2318,default,pd.html
http://www.carmagazine.co.uk/car-reviews/mini/mini-five-door-hatchback-2014-review-we-test-mini-5dr/
http://www.mothercare.com/Mothercare-Nanu-Stroller/LR2318,default,pd.html