Amber Rudd isn’t a flashy politician; her office at the Department for Energy and Climate Change has almost no personal touches. She has a poster on the wall for the new Edinburgh tram (she was a student there). Her one concession to vanity is a framed ‘Minister of the Year’ award from this magazine: awarded for uprooting the legacy of the Liberal Democrat energy policy and being (in the words of the commendation) the ‘slayer of windmills’.