Nine men and three women are arrested as police investigate the lead-up to the crash that killed seven people. Five men who died after hitting a police car on a dual carriageway may have had links to "serious and organised criminal activity," UK police said. Key points and original sources are listed below.

• Nine men and three women are arrested as police investigate the lead-up to the crash that killed seven people.S1

• Five men who died after hitting a police car on a dual carriageway may have had links to "serious and organised criminal activity," UK police said.S2