We are only having a homebuyers report as was told structual would not tell us why and how, so we are expecting to have to pay for SE.
Told by who? The building surveyor doing the report? Well pfft!
Chances are the homebuyers report will have a line on it saying: "cracks in various places recommended that a structural survey is carried out" etc etc.. unless its pretty obvious as to the cracking reason.. but least the report will tell you the wiring is old and the boiler needs replacing..
Anyways based on the one photo of each heres best guess on the cracks, would normally need to poke about the place to give a full idea..
Ceiling crack looks like someone was boucing around too much in the loft and caused a minor crack in the plasterboard.. check the walls each side and see if the crack runs down them if not, then simple crack repair to artex..
Door crack around lintel looks like just normal movement in the wall nothing special, but check the door still sits in the frame and doesnt wedge in a corner which can indicate a far greater problem
Random diagonal crack, appears to only be in the plaster, probably a shrinkage crack if the plaster is <10yrs old..
Crack in corner near sliding door, is this the other side of the extension? Photo isnt great, cant really see the crack too well
Brickwork crack, well someone made a measuring error.. seems like the crack is re-occuring and has been repaired in the past.. is this the division between old and new extension?
Brickwork crack 2, urm same as above? Other side or same crack?
Crack under window, would need to know the length of the wall that occurs on, as well as general location in building.. look outside the window for cracks around the window corners as well as inside.. could just be thermal movement in internal blockwork..
Nothing to lose sleep over really..