O governo do Reino Unido tem uma excelente ferramenta ( clique aqui ) para ver se você precisa de um visto. Eu verifiquei uma cidadania que normalmente requer um visto para transitar no Reino Unido e não sairá do aeroporto.
Exemptions
You don’t need a visa if you have one of the following:
- a visa for Canada, New Zealand, Australia or the USA (this can be used for travel to any country)
- a residence permit issued by Australia or New Zealand
- a common format residence permit issued by an European Economic Area (EEA) country or Switzerland
- a resident permit issued by Canada after 28 June 2002
- a uniform format category D visa for entry into a country in the European Economic Area (EEA) or Switzerland
- an Irish biometric visa (marked ‘BC’ or ‘BC BIVS’ in the ‘Remarks’ section)
- a Schengen Approved Destination Scheme (ADS) group tourism visa where the holder is travelling to the Schengen country that issued the visa
- a flight ticket from the Schengen area, if you can prove that you entered the Schengen area in the previous 30 days on the basis of a valid Schengen ADS visa
- a valid USA I-551 Temporary Immigrant visa issued by the USA (a wet-ink stamp version will not be accepted)
- a valid USA permanent residence card issued by the USA on or after 21 April 1998
- 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
- a valid standalone US Immigration Form 155A/155B issued by the USA (attached to a sealed brown envelope) All visas and residence permits must be valid.
Eu destaquei em negrito o que se aplicaria a você. Por favor, verifique com sua nacionalidade e circunstâncias para ter certeza sobre o link fornecido.