Okay I put a rename tag on this and changed the text. The only discussion that needs to be made is if either to delete or to move the page. I am 100% sure that the name Wendy is wrong.
There is noone in the series that the text, that was added there before fits to. None of the two girls in WoK appear in Revenge of the Slitheen. Before it was written that Pamela Merrick was playing her which is wrong. Pamela Merrick played a Wendy, but this Wendy was a headministress and she also didn't appear in WoK, even though she was listed on the episode page before: See