Looking at today's flights from Sharm El Sheikh, the Monarch Airlines flight to Manchester at 1640 has been cancelled but that might have nothing to do with security issues. Their 1735 flight to Gatwick is shown as operating normally, as is their 1815 departure for Birmingham.
Thomson have cancelled their 1820 flight to Manchester and their 1900 flight to Doncaster but they are still operating their flights to Glasgow (1550), Gatwick (1725), Bristol (1820) and Birmingham (1900).
easyJet's flights to Gatwick (1710 & 1905), Stansted (1740), Luton (1845) and Manchester (1850) are all expected to operate normally.
BA's flight to Gatwick (1710) is still expected to operate.
Thomas Cook's flights to Gatwick (1730) and Manchester (1835) are also still shown as 'scheduled'.
Interestingly, Sharm el Sheikh airport is still expecting to receive flights from the UK today (with all of the above airlines) apart from an easyJet cancellation ex Stansted, a Thomson one ex Manchester and an easyJet flight ex Manchester.
http://sharm-el-sheikh-airport.com/flight-status-d.htm