Thanks everyone.
She will probably have been arrested by now - she was due in court yesterday morning and if she turned up they were going to detain her, and if not, they were going to look for her and arrest her.
We have lived here for 6 years, and the people before us lived here since the house was built. They were a middle aged couple so I don't know....unless she was related to them somehow.
I am pretty freaked out about her giving our address out for the last year, but the police have made sure all the relevant people have been notified.
I'm just glad I opened that, otherwise the police might have turned up looking for her if she didn't appear in court yesterday!
xx