Ambulance members of the Psychiatric Nurses Association are holding the first of a series of 24 hour strikes today.
There have been six previous 10 hour strikes, as part of a long running campaign over trade union representation rights.
The ambulance branch of the PNA, the National Ambulance Service Representative Association, is not recognised by the HSE.
Peter Hughes, General Secretary of the Psychiatric Nurses Association, explains what is involved in the strikes:
