City of London Police are now saying no-one was detained in connection with the suspect package in the Old Bailey, contrary to their earlier statement.
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The note was left for paramedics attending an emergency call in Stoke-on-Trent on Sunday morning.
Monday will see a dull, damp and murky start, with temperatures reaching highs of 13C (55F).
Alexander Krushelnitsky is widely reported to have tested positive for meldonium, a drug which increases blood flow.