Just came across this via a Similar Threads link below the post I've done at Megs Jenkins' place. I was unaware one had been started for Clare until now, although this was before I joined. Last year, wellendcanons put her name forward as one of the many http://filmdope.com/forums/ac...actresses.html, so I followed this up with a couple of posts. She takes up much of the third page at that thread.
Clare Jenkins in 'Randall and Hopkirk (Deceased)' (1970) (filmed August/September 1968)
I should have remembered Clare Jenkins from the episode
The Smile Behind the Veil, but her appearance was so fleeting.
Therefore, she's a classic example of an Unnoticed actress. With her is a young Michael Radford, the future film director:

They're credited as 'Female Hiker' and 'Male Hiker', seen here spotting a wishing well (situated at Rowley Farm, Well End).
At the well, Michael wishes he were a millionaire but the couple are suprised to hear a voice below coming back at them:
("And I wish I was out of this perishing well!")

Mike Pratt as Randall and Kenneth Cope as Hopkirk