The IBTS says stocks are critically low after the bank holiday weekend and O-positive is down to just over two days’ supply which is the lowest level recorded this year.

Other key groups sit at a precarious three-day supply.

An emergency clinic has been scheduled for the Abbey Court Hotel, Nenagh on Sunday 12 April from 11:50am to 3:10pm.

Walk-ins will be accommodated if possible, but donors are strongly encouraged to book an appointment in advance.