Uk transit visa

[ABC_XYZ]

Hi,

My parents got a 10 years Visitor USA Visa last year. They are planning to come to USA in March by British Airways (BOM-LONDON HEATHROW-DALLAS FT WORTH, TX). They have 4 & 2 hours waiting period at the Heathrow Airport while coming and going back respectively.

Do they require a UK TRANSIT VISA?

I will appreciate your suggestions.

Thanks,

[txh1b]

No as long as they are in the same airport and have a valid US visa. Check with the airline for the latest rules.

[ABC_XYZ]

Thanks, txh1b!
I already contacted British Airways regarding the Tansit Visa rule, however, they didn't give me any information. They asked me to contact the UK immigration office directly. I did some research on their website, it was little confusing. However, thanks for your reply. I got the same answer from my another friend. I appreciate your help.

[immihelp]

Not required.