Having looked into this in more detail, it seems the test is taken via a video link and you have to show a photo id to the examiner. Assuming the examiner conducting the test is based in the UK.

Thanks for the link. LanguageCert is the provider that has a test centre in the area I'm originally from in Pakistan. Will that test be ok for British Citizenship application?

Hi, I have settled status. I'm thinking about applying for British Citizenship and there isn't an Home Office approved English language test centre where I live in the UK. I have to travel to another city. I'm due to travel to Pakistan soon and I was wondering if I took the B1 test at the Home ...