I'm with Piers on this one.
It gives nothing for the idea that a little known foreign architect could make a success and a name for themselves within the UK.
It smacks to me as a cynical political move to avoid the potential for bad publicity from a highly regarded international professional being refused a visa - all the while restricting the freedoms of the rest of us.
If the elite are free to go about their business, then we can all pretend everything is rosy. What a warming Christmas message.