I don&#x27;t think that there&#x27;s any evidence that there are hordes of Americans just waiting to move on over.<p>In the UK immigration from former colonies is no longer treated any more preferentially than immigrants from non-EU countries who aren&#x27;t former colonies (youth mobility visa excepted).<p>After WW2 and Britains labour shortage, full rights of settlement were granted to everyone in the commonwealth, hundreds of thousands came and settled from Africa, Asia and the Caribbean. Why should an american have preference when their family left 5 generations ago over someone who arrived 2 generations ago?<p>Many Africans and Asians come to university in the UK and decide to stay here, not so many Americans do - they have prestigious universities of their own. These people are not desperate and are talented.<p>Britain imports lots of doctors &amp; nurses from commonwealth countries, these people are talented.<p>British Asians contribute something like 6% of UK GDP, despite making up 4% of the population. These people have money.