Got some slight rot where the bulkhead bolts through the chassis with the long bolts. Have replaced the bolts and one outrigger was just wondering how important the condition of the bulkhead fixing point is for the MOT. Thanks for any help And comments

extremely but may be hard to see well, as is mounting point and any rot within 30cm

On my last series 3 it failed on one of those points being half rotten, as it acts as a whole body mount as-well because other parts are mounted to it, it is very important.
One thing though when I took out the bolt on the offending mount to replace it, it fell off and the bulkhead dropped by 1/4 of an inch, the point I am trying to make is that you cant see that the mount is attached or not when it is all bolted up but seeing as you have already replaced your bolts yours are obviously still attached.

Hope that helps