Hi there, I am looking to convert a semi detached house into two separate flats, ground floor would be flat 1 and the first floor and attick flat 2. Not decided yet on the access to Fl2. I'm very new to this and not to mention safety laws.One option that I am considering is that both flats will be accessible through the front entrance. The staircase to the first floor is located in the centre of the property. Ground floor also benefits from the door on the back of the house (to the backyard). Will the front entrance of the house that shares only a corridor of 2-3 metres length be sufficient as a fire exit? I'm not sure if it's worth mentioning but the stairs in the house  are made of wood. Will covering it with special fire resistant paint be enough or do  we need to do more?What else do we need to be aware off? Please help. Any feedback will be much appreciated.

You will require planning permission, plans and Building Control approval. You should appoint a competent person to assist with this. Building Regulations are here: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/441669/BR_PDF_AD_B2_2013.pdf