Hi, I'm thinking of making alterations to my kitchen (see pic). It currently is accessed from an arch through longer/dining room to the right and has a non escape window on the left and an external back door on the right. I am considering separating the lounge and dining room with a wall, making an access door from the hallway but keeping the arch through to the dining room which has patio doors to outside. Would I be able to brick up the back door, creating more storage space, if I change the window to an escape one? So to recap, the new kitchen would have an internal door from the hall, an arch through to a room with patio doors and an escape window. BTW it's not to scale! Thanks.