A history of Modern Britain by Andrew Marr

The book kept me intrigued and glued for the first part of the British story after the Second World War till the 1960's, but then it started to read like a political story of Britain which I found difficult to follow. There was far too much focus on politicians for my taste. More analysis and less can us would have been better in my opinion as Andrew Marr has an interesting view on events. I don't know what kept him from elaborating more?