Martin Dockrell, from the campaign group ASH (Action on Smoking and Health) explains why he believes it is right to regulate electronic cigarettes.
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A drug and alcohol abuse charity has warned a new law making psycho-active substances illegal won't necessarily solve the problem.
This weekend's show is the first to take place there since new rules came into force after the Shoreham aircrash.
The family of two little girls who were left paralysed following a crash say they will never forgive the driver who caused the collision.