I would like to buy a used automatic car (preferably approved used), priced around £7000 pounds.

Need to do 12000 miles/annum (80% London high streets, 20% motorway), with 3 people on board including a baby.

The attributes in order : safety, economy, comfort, practicality, high seating position, less than 4400mm length.

Need to use it for next 3-4 years.

I am very confused between models, could you suggest me one..