your girlfriend had a right to a minimum of 4 weeks notice to quit a property so the notice period was illegal. tell the landlady to get stuffed and add that she will have to drag you through the courts kicking a screaming before she gets a penny - that should put her off! make sure you also keep all correspondance and make a note of times/dates of notice, demands for money and phonecalls. you may also be able to show that she has been harrasing your girlfriend, which will not do her case any good. Good luck x