I moved to the UK last year because of work. I have recently had a new passport this year, because my previous passport was expiring. Do I need to have the UK visa sticker on my new passport as well? Is there anyone I need to inform about my new passport? My UK visa is valid for three years.
According to the Home Office, it is not required to transfer your visa, although you can if you want (it costs money to do so). See Transfer your visa to a new passport for more information.
You don’t have to transfer your visa - you can carry both your old and new passports when travelling to or from the UK instead.