Thanks. There is a means of escape from Bedroom 2 out the window and on to an extension roof. That bedroom will have 2x FD30 doors from the main house. And no, there is no door at the top.
re the builders/plans: the initial builders split in July and partner 2 took over from partner 1. Partner 2 set up a new company - so I’m not sure who/how we can complain/claim to rectify