With protests already planned for this weekend's Lib Dem party conference in Brighton the police, politicians and businesses will all have their work cut out.
Around 8,000 politicians will descend on the south coast for the party's first get together in the city for five years. Andy Dickenson reports.
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Dry and sunny tomorrow and feeling warm.
Mild tonight with warm sunny spells and light winds tomorrow.
A section of the M3 has been closed and bomb disposal units are at the scene after reports of "potential hazardous material in the road".