ok, just spoke to local loft company who sounded absolutely horrified with whats been done, installing a new dormer window without proper flooring is apparently illegal - is this true ?. A little bit scared and very concerned now.
It's become obvious that this house has been sold under false pretenses - the two loft rooms look great, look like usable rooms and have been sold as bedrooms which they are not. Yes, we have to bear some responsibility for not having a full structural survey done etc but we bought this house in good faith so I think we have grounds to take this further with either the estate agents or the sellers. However, this is further complicated by the fact that the sellers have in fact only moved across the rd and we've become friends, they're a retired couple in their 70's.
What a mess !