BBC Erotic Massage – London

Hello.
We are new to this site, and we are dipping our toes in the cuckolding pool. Intense fantasies and extensive fantasy sharing, realistic discussions about what could/might happen. Small, cautious steps.
Now we would like to actually DO something. We would ideally like for her to receive an erotic massage, and play – short of actual penetration – with him present and watching.
For us the masseuse needs to be a BBC bull. This is a must for us.
Can anyone give us a recommendation how to find someone in the London area who can help us with this?
The cuckold and interracial cuckold community isn’t really well represented in the “mainstream kink community” online we find 😉
Thanks in advance for any responses and pointers.
AMG