Question to the Home Office:

To ask the Secretary of State for the Home Department, how many Tier 1 Investor visa applications by people from Russia led to the granting of British citizenship in each year since 2008, broken down by people who subsequently (a) retained and (b) renounced Russian citizenship.

The data is not available. Immigration statistics for the year ending December 2021 are published at Migration statistics. While these include statistics for naturalisation as a British citizen based on residence, they do not identify the specific routes of entry used to secure that residence.