Indian passport holders applying for a UK Standard Visitor (Tourist) Visa must provide a valid passport, proof of sufficient funds, employment/business details, and a travel itinerary. All documents must be in English or Welsh, and you will need to submit your biometrics at a local Visa Application Centre (VAC).
Documents check list :
https://www.vfsglobal.com/india/uk/pdf/DocumentCheckList_300315.pdf
Standard passport, photograph and supporting documents are usually required. Specific details provided during application.