Northern Ireland's power vacuum complicates disputepublished at 10:59 Greenwich Mean Time 15 December 2022
Chris Page
BBC News Ireland correspondent
Rush-hour drivers in Belfast are sounding their horns in support as they drive past the City Hospital, where nurses have a picket line beside a busy commuter road.
Although this is the first ever UK-wide RCN walkout, members of the union here in Northern Ireland have gone on strike before.
On an equally cold December day in 2019, they took to the picket lines over similar issues.
Back then, as now, there was no devolved government due to a crisis at Stormont.
The previous strike was regarded as a catalyst for ending the political impasse after three years.
Now, local ministers are out of power again - after the Democratic Unionist Party vetoed the formation of a power-sharing coalition earlier this year over its opposition to the Brexit trade border with Great Britain.
While pay negotiations are carried out nationally, the devolved government generally pays out the salaries.
The power vacuum in Northern Ireland adds more difficulties - and many would say, causes more frustration - in this dispute.
Read more here.