A 17-year-old boy has been bailed until September 5 after being arrested on suspicion of possession with intent to supply a controlled drug.
His arrest follows the sudden death of Martha Fernback outside a community centre in South Oxfordshire.
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Friday morning's weather for the East of the region
Friday morning's weather for the West of the region
Five men who died in the water off Camber Sands were friends who had arrived to spend the day at the beach together, ITV News understands.