Mark Porter joined the BBC in 1992. He was health editor at Radio Times for 10 years, and has presented Watchdog Healthcheck; is a regular on the Jeremy Vine Show on BBC Radio 2; and presents Case Notes on Radio 4. Mark spent five years in a variety of hospital specialities before entering general practice in 1990, where he still works half-time at his busy NHS practice in South Gloucestershire. He is a keen writer and currently has columns in the Evening Standard, Sainsbury's magazine and Closer.

Mark, a keen runner and tennis player, is 41 and lives on old farm in the Cotswolds with his wife and their two teenage daughters.

"I have always enjoyed listening to Case Notes and was the over the moon when I was given the opportunity to present it. The programme gives listeners (and the presenter) an all too rare an insight into what leading specialists from around the world consider important in their particular field, putting the various breakthroughs and inevitable controversies into true context. There's an old medical adage that if you want a good opinion, then ask a busy doctor - and that's exactly what we do on Case Notes".