The Post Office has issued an apology to anyone affected by today's strikes:
We apologise to anyone affected by CWU strikes at 370 Crown Post Office branches today. Over 100 did open and 97% of the network unaffected.
More top news
Temperatures will remain close to freezing.
The prime minister's announcement came as international leaders gather in Paris on the second anniversary of the climate change plan.
Prime Minister Theresa May said in October the Government will shift towards an organ donation system in England which presumes consent.