The PR postcode area, also known as the Preston postcode area,[2] is a group of eleven postcode districts in North West England which together cover northern Merseyside and parts of central and southern Lancashire.Its four post towns are Chorley, Leyland, Southport, and Preston.Mail for the PR postcode area is processed at Preston Mail Centre, along with mail for the BB, FY and LA postcode areas.The approximate coverage of the postcode districts: The PR25 and PR26 districts were formed out of the PR5 district in January 2001.Leyland became a new post town at this time, having previously been part of the Preston post town.