MARY GREENHAM: I’ve never worked harder in my life than in my local supermarket

It’s Tuesday evening. I’m wearing a uniform of green T-shirt and black trousers and find myself engaged in a delicate negotiation over a bottle of pinot grigiot. I’m quite familiar with the stuff. In normal times I’m a celebrity agent to a number of high-profile clients, among them Martina Navratilova and Andrew Marr, and it’s … Read more