We are all Indian passport holders. We plan to travel in 2 groups to Vienna from Mumbai.
The first group goes BOM-LHR-JFK-LHR-Vienna-LHR-BOM. Everybody in this group will have valid visas for USA & Schengen. Would it be necessary to have UK visa?
The second group goes BOM-LHR-Vienna-LHR-BOM. Everybody in this group will have valid visas for Schengen. Would it be necessary to have UK visa?