well that was fun trip to garage.
service and brake fluid done quick and cheap
when looking into limp mode confirmed as air system leak so did a pressure test and leaking from turbo inlet pipe and massive leak on the inlet manifold - yay!
looking at days labour to replace gasket and bolt(s) if break
also noticed dpf regen not been happening and is 80% full, and so if not clear when everything else done strip and clean of this required as well