Police questioning a 38-year-old man on suspicion of killing a married couple in an alleged hit-and-run in Bristol have been granted more time.
The suspect, who has not been identified, handed himself in to police hours after Ross and Clare Simons were killed on Sunday.
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Six people have been killed and a seventh is critically injured after a multi-vehicle crash in Birmingham in the early hours of Sunday.
It will be a frosty start for many across the UK with slow-clearing mist and fog across parts of central and southeastern England.
The prime minister says she has proven the "doubters" wrong but still faces opposition from both sides of the Brexit line.