A lovely course I attended so now i can offer you a Closing the Bones ceremony.
I am a member of DUK, they provide a mentoring system with guidelines for practice and a whole host information. They also have a directory of doulas so you can find one in your area. They also offer a brilliant service for those families unable to afford a doula. More about that here
The Doula UK Access Fund covers the expenses of Doula UK doulas volunteering to work with local clients in financial hardship, enabling those on a very low income to have the support of a doula.