How long does it take to change UK visa photos?

Replace as needed. According to relevant regulations, when applying for a visa in the UK, if the photo does not meet the requirements or needs to be replaced, it can be replaced at any time as needed. A visa is a type of official document or permit issued by a country or region that allows individuals holding the visa to enter the country or region and stay within a certain period or engage in specific activities, such as traveling, studying, working, visiting relatives, etc. The visa usually comes as a sticker affixed to the passport, but can also be an electronic visa or a paper document.