Though l would check the manifold and having taken off the turbo heat shield there's a nut missing from the manifold.
All the others are tight. l assume (as with all things Defender) that this is worse than just a missing nut.
The thread looks fine on the stud and it's no further out than the others, from what l can see.
l've got a bolt to put on, but suspect this is a more involved issue. l've got to drive to Wales and back tomorrow in the thing, is it safe to put a new bolt on and go?
Do l need a new exhaust manifold and studs?