Dear @Sherif,
thank you for sharing your friends situation with us.
As for the questions, I found out the following:
For nationals from outside the European Economic Area (EEA) or Switzerland and subject to immigration control:
- give notice
- get married or form a civil partnership
Your friends and his partner must give at least 28 days’ notice at a designated register office if both the following apply to either of you:
- you’re from outside the EEA or Switzerland
- you’re subject to immigration control
- https://***.gov.uk/government/publications/designated-register-offices-in-england-and-wales
For further information please follow the link:
https://***.gov.uk/marriages-civil-partnerships/foreign-national
I hope I could help, if there are more clearifiaction needed, please do not hesitate to use the community.
Best regards,
Nilab