Inquiry about Private Candidates for Cambridge Examinations

To whom it may concern,
Hi, I am interested in appearing as a private candidate for Cambridge examinations. I wanted to inquire the centres that ccepts private candidates for these exams in the UK more specifically near Birmingham.

Additionally, I would like to know which subjects are offered for for Cambridge examinations. My chosen subjects are as follows;
Cambridge International AS and Alevel:
1-Biology:9700
(Paper 1,Paper 2,Paper 3)
2-Chemistry:9701
(Paper 1,Paper 2,Paper 3)
3-Physics:9702
(Paper 1,Paper 2,Paper 3)
Cambridge OLevel:
4-First language Urdu:3247
(Paper 1,Paper2)

I appreciate your time and assistance in this matter. Thank you in advance for your prompt response.

Best regards,