Hand baggage being relocated to the hold (internal or external) without being subject to questioning about content, particularly with regard to spare lithium batteries
I'm well aware of the developing lithium batteries issue, but I have never been asked with mainstream hold baggage if it contained them either - and for many pax, they probably wouldn't have a clue what a "lithium" battery actually was. Nor does the UK government's information on prohibited baggage make any mention of these, only (specifically) lead-acid batteries and vehicle batteries. Does one arm of the government know what the other is doing ?
Dangerous and restricted items: what you cannot take on board an aircraft : Directgov - Travel and transport