There are retailers, cafes and coffee bars all over the U.K., Ireland and the Channel Islands serving Marimba Hot Chocolate Melts. Browse the full list or simply head straight for:
7 Duke Street, St. James's, London, SW1Y 6BN
https://www.dukesluncheslondon.co.uk/
Dukes Cafe serves Marimba Hot Chocolate Melts, made with flakes of real chocolate:
Smooth milk from Venezuela cocoa beans.