Simplify the following text for a Grade 7 native English-speaking person.
Original: The town is ranked in the top five shopping centres in the south east of England for shopping yields and with more than one million square feet of retail floor space , in the top 50 in the UK .
Simplified: Today , Maidstone is one of the top five shopping centres in the south east of England , with more than one million square feet of retail space .