Hello I have a builder coming next week to do some jobs for me. One of which is to move some internal walls for me. I have tried to draw what I am planning to have done in the attached image. There is an old pantry in the kitchen which I would like removed. The area marked in red is the wall I would like taken out (approx 35cm wide) and the doorway next to it moved across as well. All fairly simple. Sitting on top of the section of wall I would like removing is a joist that runs across to the opposite wall (shown in orange). Above that is more wall on the first floor. All the walls are solid brick construction. My question is does this job require building regulations approval? I have tried reading the guidance and I am not 100%. Many thanks for your help in advance.