I have two main recommendations:

For my time period--which is the English Civil War-- perhaps the most prominent historian was Christopher Hill, and particularly his book The World Turned Upside Down: radical ideas during the English Revolution. I would argue that he is one of the reasons why people nowadays know anything about the 17th century England at all. It is a good book, and in my opinion also a good introduction into pre-modern radical thought in England.

Another absolute classic is E. P. Thompson's The Making of the English Working Class. It's not an easy OR short read, but it was a big part of the foundation of the field of social history. It remains a staple.