This is a book for dipping in and out of: I have been picking it up in idle moments and reading one or two episodes at a time and it is perfect for that approach. It's a collection of short pieces each of which tells, briefly, the story of an apparently inconsequential event that turned out to be hugely influential over British history.
For example, the very first episode tells us about Ealdor Byrhtnoth, a Saxon leader in 991, who was fighting off an invasion of Norwegians. Curiously, Byrhtnoth thought that defending a gap that meant just three of his men could hold off the entire Norwegian contingent was unfair, so he invited the whole opposing army out into the open so that they could have a fair fight. Only it wasn't fair because Byrhtnoth was massively outnumbered and, therefore, slaughtered. This set off a whole chain of events that led eventually to King Harold II's army arriving exhausted at Hastings and losing to William the Conqueror. And the rest, as they say, is history.
There are anecdotes about war, food, science, politics, music & literature and health & safety. The book is written in a light-hearted, easy to read way and it's an entertaining way to fill in some idle moments during the day.