My 58-year-old sister has MS, and her left leg has recently weakened. She is hoping to qualify for a Motability car, and would welcome your advice on the best for her needs. She is very anxious to have minimum fuel consumption. She has to fit a walking aid into the boot but would like the smallest four-seat car possible. She lives in a city and finds parking difficult. Because of her weakened left leg, she needs automatic transmission. What do you suggest?