Lost passport

Good evening all,
is it possible to find out where my relative can apply to get the information on the dates of visits to the UK? my relative's passport was lost/stolen at the airport she had valid UK visa there. she applied to the police but chances it will be found are very slim. she applied for a new passport but she needs to submit documents for her new UK visa now but bearing in mind she does not have her old passport with all immigration stamps there she would not be able to submit information about all her UK visits as I think it is up to 5 or 10 years.. where she can possibly write to obtain this information? airport authorities perhaps or something like boarder control? who has any ideas please as she does not know what to do know. thank you for all advices on how it is better to proceed.

Search for your old tickets/boarding passes. If still no success then contact airline or same travel agent.

Should Seagul’s recommendation not work, please see the following to be completed by the requestor only:

https://www.gov.uk/government/publicati ... mmigration