How long can under-pressure health service continue without a Health Minister? #BBCNolan

How long can our health service do without a Health Minister? The DUP's Simon Hamilton resigned from the post last week, as part of a DUP response to the Sormont crisis. It seems the job could stay vacant for weeks - Peter Robinson has suggested his Ministers will keep being re-appointed and then resigning. But what impact will that have on our under-pressure health service, with its spiralling waiting lists? Stephen talks to Garrett Martin from the Royal College of Nursing - RCN and Ray Rafferty from the union Unison