Makes sense that Mike, she had just moved Vivarium when the problem started.
She's much more settled now, though since I put hides in the Viv I see much less of her, normally just a head peeping out of the hide in the warm end!!
Made it difficult to interest her in her mouse. I tried the technique of 'braining' discussed on the forum.
Cut the mouse and left it just by the mouth of the hide on top of a log, she took it and ate within a few mins. So that's a trick I'll keep up my sleeve in the future.