The only answer I received from this expert was that she is a busy solicitor and cannot answer the question right now, she'll get to me when she can. That was two days ago and that is not an answer. If she is so busy, then she should not accept questions.
The contract is an assured shorthold and was made initially on june 10th 2012 and renewed last year on 10th june 2013. Yes, X assured us it would be for as long as we like, this is why we made the changes we did. We realise we have to move out, but we feel some recompense is only fair and also we have a house to move to, but it's not ready until 12th July, so we don't want to move until then.