Politicians certainly take their lumps, to the point where one might wonder why someone excelling in a career away from politics would make the move to Westminster. David Davis did just this, becoming an MP after serving as a senior executive at Tate & Lyle. He talks to Portland senior advisor and almost-namesake David Davies about the lessons he learned in business that helped him in politics, reflects on the sea changes he has witnessed during more than 30 years in Parliament, and reveals why more power can sometimes be wielded from the back benches than the front.