I've jusr spoken to my daughter in the Uk who has told me that passengers are not allowed to take on any cabin baggage, apart from essential medicines, baby items (which must be tasted by the carrier at the checkpoint) and wallets and change purses. There are major delays at UK airports while security checks are being carried out.

Timw will tell whether this is a false alarm. At some time the people being held will either have to be charged or released and, in the UK, this is likely to be made public fairly fast.