大象传媒

Sarah Wollaston, the Conservative MP for Totnes, is a new kind of politician in many ways.

Selected as Tory candidate by an open primary in which all her future constituents were entitled to vote, she has no tribal background in the Conservative Party or, indeed, politics full stop.

For the last nine months she's been discovering just how hidebound the world of Westminster can be.

Recently she turned down the chance to become a Permanent Private Secretary - the first rung on the governmental ladder.

Martyn Oates caught up with her at Westminster to find out why.