Mark Thomas' Check-up: Our NHS @ 70

Mark Thomas is 54, the NHS is 70.UK national average life expectancy is 84.If Mark makes it to 84 the NHS will be 100...what will they both look like?With the NHS in apparent perpetual crisis, Mark Thomas finds out what's going wrong, how it can go right and what the future might hold for all of us.In a series of interviews in advance of the show, Mark speaks to leading experts, and looks at what lies ahead for our health service.