Calls for Britain to distribute vaccine to less privileged nations, once vulnerable people in Britain have been treated, are very noble.
But who decides who 'the vulnerable' are? Who are the vulnerable? The elderly? How elderly? The unwell? How unwell? NHS workers? Teachers? The police? Refuse collectors? Supermarket checkout operators? Shelf stackers? The cleaners and window-cleaners?
Surely, to some extent, everyone is, to some degree, 'vulnerable' (well, no-one, it seems, is totally impervious). Additionally, even those who might be regarded 'less vulnerable' can still, potentially, be dangerous spreaders of the disease.
I don't criticise the sentiment of wishing to make vaccines more readily available to the people of struggling nations, but I suspect that in practice this might not be at all straightforward.
Suggestions invited.