To be fair the BBC is reporting:
The British government investigated and concluded the incident was linked to routine Egyptian military activity and was not a "targeted attack".....Aviation security experts told BBC security correspondent Frank Gardner it had involved artillery practice by the Egyptian army.
Link:http://www.bbc.co.uk/news/uk-34754577

There has been press reporting here of chaotic airport security @ Sharm, with bribes to pass through screening and poor security for airport staff. One gets the impression these reports did not reach anyone brave enough to refer the concerns to politicians.