This is Samantha Lane.
She played Ashley in London, and are currently understudying her there.
Here's a picture of Samantha as Ashley:

It's Samantha who play's Ashley on the 1993 recording of Starlight Express from London.
She has also played almost all the other girls, including Belle.
And belive it or not, once she played The Prince of Wales!!!
She is also understudying Pearl and Buffy in London right now.
Here's Samantha as Pearl: