Europe
It follows the decision by some European countries – including Germany and France – to advise against its use for older age groups.
Six European leaders, also affected by the upcoming delay, have described the situation as "unacceptable".
Labour leader says there is no scope for renegotiation of the trade deal agreed by Boris Johnson.
Britain is under fire for its handling of the jabs, but the rollout in some other countries has been described as a “disaster”.
From healthcare to studying abroad, our relationship with the bloc is now very different.
So far ten European countries have closed borders to Britain amid fears about a new strain of the coronavirus ahead of Christmas week. A mutant strain sweeping across London and the South-East of England has prompted EU nations to start restricting inbound flights from the UK. British Prime Minister Boris Johnson said there is no evidence the new variant causes more severe illness or higher mortality but it does appear to be passed on significantly more easily. He said the new strain could be up to 70% more transmissible than the old virus variant.
A number of European countries have banned travel from the UK in a bid to prevent the spread of a new strain of coronavirus.
Germany, Belgium and the Netherlands are among the countries that have placed restrictions on travel from the UK.
"There remains a difference between what you are being permitted to do... and what you should do," WHO says in an appeal to European countries.
Is Britain's decision to relax lockdown for five days safe? This is what other countries have chosen to do.