You might want to get a directory of residents of Epsom, Surrey, UK and see how many with the Randall surname live there.
I did that a few years ago, only in the USA. Then, by writing a letter with a self addressed stamped envelope inside with the return address on it, about 25 or 30 letters went out. Two responses led to contacts who were related and wanting to share information.
It could be one approach to obtaining names and making contacts with your living Randall relatives.