I'm not sure there is a live link of "Claire and her friend" in this thread anymore, so I am posting this one....
Looking for the girl on the left in these pics
...this was Funky's reply when I requested "The girl on the left" (it links to this thread)
She only appeared with Claire some 6-7 years ago http://itcom02.ru/forums/thread/134796.aspx
Some argued they were sisters, and some were convinced that your girl was in fact Claire.
In any case after those few sets they never did appear again.