There is a British author and journalist called Peter Crowther, but he does not appear to have written on political matters.
Alan Hollinghurst observed in a talk that 'books are often stuffed with information as a substitute for imagination', and that he himself uses information as a 'trigger' for his imagination. Maybe the name Peter Crowther is one such trigger.
Hollinghurst reiterated his views on the use of factual information in novels in a 2012 radio interview, saying, 'I don't actually like research. I slightly mistrust research ... I like things which can act as a sort of trigger to my imagination ... I think it's all too easy for fully-imagined things to be replaced by just great wadges of information'.
Click here to see a video of the talk.
Click here to listen to the 2012 radio interview.