From the KOYLI Museum website
https://www.doncaster.gov.uk/services/culture-leisure-tourism/king-s-own-yorkshire-light-infantry-museum
The King’s Own Yorkshire Light Infantry Museum offers a paid research service looking into soldiers who served in the regiment. These searches will incur charges dependent on the complexity of the enquiry. If you are enquiring about the Museum’s research service, please provide as much information as possible about the individual you are researching including name, service number, battalion number and dates served, if known. Please note it may take up to 4 weeks to investigate and respond to your request. For more information about the service and the research charges, please contact