Question to the Home Office:
To ask the Secretary of State for the Home Department, how many applications for visitor visas from (a) US, (b) Russian, (c) Indian and (d) Chinese citizens were (i) granted and (ii) declined in each of the last five years.
Applications for visit visas are considered against Appendix V of the Immigration Rules and on a case by case basis. Detailed information on how UK Visas and Immigration makes decisions on visitor cases is published at https://www.gov.uk/government/publications/visit-guidance.
Information on total entry clearance visas (the majority of which are visitor visas) broken down by nationality and outcome (grants, refusals, withdrawals, lapsed) is published in the quarterly Immigration Statistics Visas volume 1 table vi_02_q at https://www.gov.uk/government/statistics/immigration-statistics-year-ending-march-2019-data-tables.
Please note that the large majority of US nationals coming to the UK as visitors do not require an entry clearance visa, as shown in the Immigration Rules at (https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-v-visitor-rules).