You can check for yourself
https://www.gov.uk/check-uk-visa/
trying to assess your situation, Indian passport, in transit airside, destination somewhere other than the UK or Ireland
I think you land at this page
https://www.gov.uk/check-uk-visa/y/i...ewhere_else/no
Which has the following exemption for requiring a visa
You do not 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)