Question to the Home Office:

To ask the Secretary of State for the Home Department, how many people received UK citizenship through the Tier 1 Investor Visa between 30 June 2008 and 6 April 2015.

The data is not available. Immigration statistics for the period 2008 to 2015 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.

Migration transparency data - GOV.UK (www.gov.uk)