UK rock band Fightstar used clips from the film for their music video, Floods. The band had set the release date but had to change it because of the real floods hitting the UK.
Although the senior military advisor is referred to frequently as 'Major General' his rank badges are those of a (full) General. In addition, a Major General would be normally be addressed as 'General'.
At the beginning of the film the wave heights are report in feet. The UK Meteorological Office, as does all meteorological and marine agencies, record wave heights and tidal ranges in meters.
In flight scenes involving the Tornado GR4 it is plainly only carrying 2 fuel drop tanks and nothing else. If was sent to destroy the Thames Barrier it should be carrying air-to-ground missiles.