It's completely disingenuous to say that we haven't been importing millions of vaccines. 10 million Pfizer from the EU, millions of AZ from India.I think it's slightly disingenuous to say the UK hasn't exported any vaccines.
Now, we can do that because we signed big contracts early, and those helped build those pipelines. In time that means more people both in the UK and around the world will get jabs sooner. But let's not pretend we're helping other nations now.