BA currently have a BHX based A320 on the ground at MAN after diverting their with engine trouble.
Due to the fact that BA currently have 45 engineers on Gardening leave at Man and have closed the Hangar, they no longer have enough engs. to carry out the engine change.
Engineers at LHR are now refusing to travel to Man to fix aircraft in support of the Gardeners.
So BA have sent two management engineers to progress the job.
Just remember the last time management fixed an aircraft during a dispute the Captain ended up doing an extenal inspection of the Nose-cone at 10,000 ft :
