Scotland Yard has confirmed that two men have been arrested on suspicion of terror offences. One, aged 50, was held in Westminster, central London, on suspicion of encouragement of terrorism and possessing information useful to persons preparing or committing acts of terrorism.
The second, aged 57, was arrested in Barnet, north London, on suspicion of encouragement of terrorism.
More top news
Cool in the north, warmer air to the south
Police have warned the drug, known locally as "pink champagne", could be deadly.
The author said "It's been wonderful" as fans mark two decades since the children's books opened up a world of magic to millions.