Coastliner 700 is a bus service operated in West Sussex and south east Hampshire, England, by Stagecoach South between Brighton and Portsmouth via Hove, Shoreham-by-Sea, Worthing, Littlehampton, Wick, Bognor Regis, Chichester, Havant, and Portsmouth with a daytime frequency of every 12 minutes on Mondays to Saturdays; the service runs every 20 minutes on Sundays.

The upgrade provoked some criticism from Derek Deedman, county councillor for the Bramber Castle area, for failing to include benefits to other services linking the coast to towns such as Steyning.

[6] Further upgrades, initially centred on Shoreham-by-Sea before being extended to the section of route between Worthing and Brighton, were announced in 2009, including bus priority measures at busy road junctions.

[11] Other changes made at the same time included a higher frequency of service between Chichester and Portsmouth and between Littlehampton and Arundel, and the introduction of later evening journeys.

[12][needs update] The route is operated with a peak vehicle requirement of 47 buses from three Stagecoach depots, Worthing, Chichester and Portsmouth.