We have an agreement for the rather unusual term of 7 months - it's a Fixed Tenancy Agreement with a letting agent. We moved in on 1st November 2013 and our bedroom window became very mouldy back in January. We weren't just putting up with mould, but also with "mushrooms" that were growing in between the outside single glazed window and the secondary glazing unit. The mushrooms would squeeze in through the secondary glazing and drop onto the window sill. We took pictures and emailed them to the agent stating it was a health & safety hazard and that both of us had had bad chests as a result of breathing in the spores during this time. It is now 13 March and whilst they've sent a couple of workmen over to evaluate it, work still hasn't begun. We dread every time it rains. We now wish to leave a month earlier than our agreement. The contract states the end of the agreement is 31 May 2014. Can we leave earlier on the grounds that the works still haven't started and the mould is still there? We don't wish to risk losing our rent paid in advance or our deposit of £1,150.