Following extensive inquiries a 26-year-old man was arrested by officers in Stoke on Trent and will now be questioned by Lancashire detectives on suspicion of murder and attempted murder.
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A humid night for some with thundery downpours in places.
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Daniel Cowell has been jailed for five years and four months after ramming a police patrol car with a stolen transit van.