The Coastliner brand for route 700 (Portsmouth - Brighton) was introduced by Southdown Motor Services in 1975.
Route 700 became part of Southdowns 'Stagecoach' limited stop network. Ironically, Stagecoach was also the name of the company which took over Southdown in 1989.
Stagecoach reintroduced the Coastliner brand in 2000 to celebrate the brands 25th anniversary.
Stagecoach brought back the brand again in 2005.
Coinciding with a new timetable and some new buses, Coastliner was renamed Sussex Coastliner despite the fact the western end partially operates in Hampshire.
Shortly after, it was renamed once more, this time to 700 Coastliner.