Personally, what is most interesting in all this is the ban on all liquids. This includes prescribed medicines that are unable to be verified to be medicines.
They are specifically identified in the list of prohibited substances on the BA website.
It appears to this casual observer that these potential terrorists have access to some form of explosive in liquid form - presumably in multiple component parts hence the hold carriage requirement - that can be used to bring down an aircraft.
It will be interesting to see if this is indeed the case and what the outcome with respect to future security measures turns out to be.