Got sent this today via email, probably best if everyone keeps alert tonight!
"Police are aware of a ride out event involving groups of motorcycles and quad bikes taking place across London during the Halloween period.
On Sunday, 30 October police received reports of a number of these riders engaging in anti-social behaviour.
Over the course of the evening offers stopped 20 vehicles - 17 motorbikes and three quad bikes - at various locations across the Capital. Eight people were arrested for a variety of offences including assault on police, failing to stop and dangerous driving.
A policing plan remains in place with additional officers deployed across a number of boroughs to tackle any offences or associated crime. Whilst we welcome the use of the public road network we will not tolerate any anti-social or intimidating behaviour. Police will take action against anyone found to be committing dangerous or careless riding, road traffic, anti-social and public order offences"