Nick Pope, who investigated UFO sightings for the MoD for 21 years, believes the threat of an invasion is serious enough that we should be preparing for the worst.
According to Nick in the event of an alien onslaught the UK would first raise the threat level to “critical" and the Prime Minister would form a war cabinet.
Nick argues that we’d have to rely on our nuclear defences as a last resort, but even then we’d almost certainly be out-gunned by our interplanetary conquerors.
His war plan advises that we should develop a biological weapon to deal with living invaders, or use powerful energy pulses to disable invading machinary.