Who ARE the real-life spoilt Country Princesses in the brilliantly satirical new novel that's got the Cotswolds smart set buzzing with speculation? Author Plum Sykes is keeping schtum - except to confirm Sam Cam isn't one!

It's a glorious spring afternoon and I'm sitting in the vast, tasteful Cotswolds farmhouse kitchen of U.S. Vogue journalist Plum Sykes, admiring the views over a Gloucestershire valley.