This Is Local London warns:

Motorists are being advised to allow extra time for their journeys if they are using the M23, M25 and A23 this Sunday (September 15), as tens of thousands of motorcyclists are expected to take to the roads. The mass convoy of motorcyclists will be travelling down from London to Brighton as part of the 20th Ace Café Reunion event. They are due to travel along the anti-clockwise M25 between junctions 16 and 7, the southbound M23 and the southbound A23. Ben Wates, from the emergency planning team at the Highways Agency, which is responsible for motorways and major trunk roads, said: “We are asking road users to plan their journeys and allow extra time as we are expecting the M25, M23 and A23 to be busier than normal.”