Investigators from The Sunday Times said they secretly filmed a doctor, dentist and alternative medicine practitioner who were allegedly willing to perform circumcisions or arrange for the operation to be carried out. The doctor and dentist deny any wrongdoing.
The practice, which involves the surgical removal of external genitalia and in some cases the stitching of the vaginal opening, is illegal in Britain and carries up to a 14 year prison sentence.
It is also against the law to arrange FGM.
Known as "cutting", the procedure is traditionally carried out for cultural reasons and is widespread across Africa.
It is thought to be needed as proof of a girl's "purity" for when she marries, but victims are rarely given anaesthetic and frequently suffer long-term damage and pain.