The British Medical Association announced that the junior doctors it represents will all participate in a strike that is scheduled to happen on April 26th and 27th. Initially the strike was only going to include emergency care staff. This new development could mean that only senior medical staff would be providing emergency cover during those two days. In addition to the strike at the end of April, just junior doctors assigned to emergency care will be holding their own strike from April 6th to April 8th. These strikes are in response to the government's imposition of a new contract despite the junior doctors complaints.
See "Junior Doctors to Escalate Industrial Action to All-Out Strike Next Month", Esther Addley, The Guardian, March 23, 2016