From the cover:
The State Opening of Parliament. The most magnificent royal occasion of the year. The Queen, her Cabinet and all the most powerful people in the land are gathering in one room, the House of Lords. And none of them know they are about to endure the most terrifying day of their lives. Not all of them will survive.
Sitting amongst the hostages are two young men, the sons of the British Prime Minister and the US President. It creates the cruellest challenge any leader could face. As the world watches on live television and holds its breath, President and Prime Minister are torn in two between their duty as statesmen, and their love as parents.
Yet others have their agendas, too, not least of them Harry Jones, a man who is already undergoing the worst day of his life when he becomes swept up in the maelstrom. What can he do about this act of terrorism when the most powerful people are rendered helpless? He can ask one simple question – why?
This is the first book I have read by Michael Dobbs and as soon as I finished it I went to the library to borrow some others. What a cracking read this was. An excellent page turner.
This book was borrowed from my brother and sister-in-law. Thank you for introducing me to Michael Dobbs.
Gippsland Granny 
Not to be confused with David Nobbs who writes great comedy – try ‘Second from last in the sack race.
I must admit we thought Peter was pulling our leg when he said that Michael Dobbs had written a book with this title. I did search for it on his website. Now I will need to check out David Nobbs.
Sounds like a good one for the kindle on our trip.!
You must read it then read all his others in chronological order.
A very gripping blurb, it sounds like a right rollicking read.
It certainly was. It was interesting that the Queen and Prince Charles had parts to play!