There are 52 weeks in a normal year, meaning you will pay weekly charges for 48 of these (52 less the four ‘rent free weeks’). However, every five to six years, there are 53 Mondays in a year and 2019/20 is one of those years.
This means that you will pay rent on 49 weeks instead of the usual 48 weeks. Please note that this has nothing to do with 2020 being a Leap Year.
If you need help understanding your rent statement please visit the tenant area of the website where you will find a useful video and guide.