Welcome. I am not sure of the answer to your question. I know that single people can adopt through the UK system and due to your ethnicity you might find it a good option as they find it difficult to attract parents of suitable ethnic origin for a lot of children.
The following may be able to help:
AFAA (Association for Families who have Adopted from Abroad)
30 bradgate, Cuffley, Hertfordshire EN6 4RL Telk: 01707 878793 e:mail [email protected]
OASIS (Overseas Adoption Support and Information Service)
Dam Y Craig, Baclva road, Glais, Swansea SA7 9HJ Tel: 01792 844329 e:mail [email protected]
Overseas Adoption Helpline
PO Box 13899, London , N6 4WB Tel 0990 168742 (premium rate)