Where could I find a harpsichord teacher?

I want to learn how to play the harpsichord because my brother plays the harpsichord. I already know how to play a few of variations from Goldberg Variations and a few Prelude and Fugue by Bach as well as a few sonata by Scarlatti so I know how to play the keyboard. Is there a database of harpsichord teachers in London and in the United Kingdom? I'd appreciate any advice. Thank you.