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To obtain a visit permit to UK , you will have to obtain an invitation from one of your relatives residing there, and then go to the embassy of UK to fill out the visa application.
The application shall be accompanied by the following documents:
1) Copy of a valid passport for at least six months 
2) Two photographs with the same specifications of passport photo with white background for each
3) booking flight
4)Booked in a hotel 
5)Bank Statement 
6)A copy of the invitation letter sent to you by a relative
You can contact the Embassy through the following link:
Embassy