As others have said, if you had no reaction to dose 1 you won't have one to dose 2, that is even more vanishingly rare (a once, maybe twice occurence in millions across the world).
I think it helps to remember that the UK is more vaccne compliant. So when there were issues the MHRA had decades of mass acc data to refer to. Other countries don't have that as much. Also that something odd definitely happened in Norway. 3 health workers in the same workplace (and then a few more people elsewhere) and a lot of theories trying to explain it. The Norwegian HA didn't condemn it they wated for the EMA, individual doctors did, as hapened a lot here. And there will have to be a lot of research into Norway's population to see if there is something there that exacerbated the immune system reaction.
That fuelled many countries 'fear' and many reacted without there being any actual measure of the RR.
Now we have that RR measured for te UK population and the various independent health regulators have made their recommendations - which the government will not gainsay!
Argh! there are far too many confounding variables. Basically, the MHRA JCV etc have made their recommendations. I don't see any reason to disbelieve them.
Other countries are taking different steps for an equally wide variety of reason, not least the relative access to various vaccines.