网站写得很清楚嘛
https://www.gov.uk/check-uk-visa ... /somewhere_else/yes如果你不是直接去美国的话,需要如下的签证才可以:
you have a valid USA permanent residence card issued by the USA on or after 21 April 1998
you have a valid USA I-551 Temporary Immigrant visa issued by the USA (a wet-ink stamp version will not be accepted)
you have an expired USA I-551 Permanent Residence card issued by the USA on or after 21 April 1998, with a valid I-797 letter authorising extension
you have a valid standalone US Immigration Form 155A/155B issued by the USA (attached to a sealed brown envelope)