Trains and bus operators are meeting with businesses from the New Forest and South Downs National Park to find out how they can persuade more visitors to leave their cars at home.
With fifty three million visits to the two national parks every year, they want more people to try greener forms of transport.
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Detectives have charged two men with the murder of Jason Martin-Smith in Hastings in 2001.
Thursday night's weather for the east of the region
Thursday night's weather for the west of the region