Invasion: Downfall - The Invasion UK series, #1

Harry Beecham's ambition was to become the British Prime Minister. But as the saying goes, be careful what you wish for... As Harry struggles with a failing economy and rising social tensions, things suddenly go from bad to worse. Scores of surveillance targets have dropped off the radar and intelligence officials are panicked. Something dreadful is about to happen. The massive truck bomb that obliterates Downing Street is just the beginning.
Barley escaping with his life, Harry seeks refuge in a Whitehall bunker. On the streets above, death and chaos. As night falls across the besieged city, Harry and his SAS protection team must escape before they are captured and killed. And if he survives the carnage of London, Harry knows that far greater challenges lie ahead. Is Harry Beecham the leader he imagined himself to be?The world is about to find out.