The UK has announced a cabin baggage ban on most electronics on many passenger flights.The ban includes laptops and any devices – including phones, tablets and DVD players – over 16cm long, 9.3cm wide or 1.5cm deep. The passenger flights included in the ban are those leaving six Middle Eastern and North African Muslim-majority countries: Turkey, Lebanon, Jordan, Egypt, Tunisia and Saudi Arabia.Downing Street said the decision is "necessary, effective and proportionate", adding that: "Decisions to make changes to our aviation security regime are never taken lightly. We will not hesitate to act in order to maintain the safety of the travelling public and we will work closely with our international partners to minimise any disruption these new measures may cause."The move appears to be in coordination with the US, where a similar ban was announced this morning. American officials said bombs could be hidden in a series of devices, with a Homeland Security spokesperson saying they are "concerned about terrorists' ongoing interest in targeting commercial aviation, including transportation hubs over the past two years".In the UK, the six affected British carriers are EasyJet, British Airways, EasyJet, Jet2.com, Monarch, Thomas Cook and Thomson, and the eight overseas airlines subject to the ban are Turkish Airlines, Pegasus Airways, Atlas-Global Airlines, Middle East Airlines, Egyptair, Royal Jordanian, Tunis Air and Saudia.Turkey's transport minister has publicly opposed the US ban, saying it is wrong and should be cancelled.