Portsmouth is the second largest city in the county of Hampshire and is the second most densely populated city in the UK, after Inner London. It is located approximately 66 miles south west of Central London, 53 miles west of Brighton and 20 miles east of Southampton. The city benefits from excellent road communications being situated at the M27/A27 junction, which links to M3 and A3(M) and provides access to London and the wider national motorway network. Portsmouth and Southsea station has a regular rail service to London Waterloo with a fastest journey time of approximately 1 hour 30 minutes. Southsea is an affluent suburb of Portsmouth and a popular coastal resort, located approximately one mile south west of the city centre and close to the seafront.