UK tourist visa from USA (Indian passport with B1/B2 stamp)

[Kraty100]

I'm touring the US from India on a B1/B2 tourist visa currently. I'm planning to tour the UK on the way back to India. Am I allowed to apply for a UK visa from the US with a US B1/B2 tourist visa stamp? I know people with H1B work visa can apply for a UK tourist visa being in the US but not sure if B1/B2 stamp is eligible. Thanks.