Glimmer, that's not quite true. Consultants are the most senior , yes, but the Dr vs Mr/Ms divide is actually a medical vs surgical thing, not a seniority thing.
Consultant obstetricians are, I believe, also surgeons, hence Mr/Ms, but all surgeons are Mr/Ms, so more junior general, orthopaedic, plastic surgeons etc are also Mr/Ms.
Conultants in general medicine, paediatrics, care of the elderly, emergency medicine etc are all still use the Dr title.
This is because in days of yore, when surgery was still in it's infancy, medical doctors felt it was a barbaric practice and objected to surgeons calling themselves doctors (even though most practicing surgeons were already docs). The two groups had a falling out and surgeons were not allowed to call themselves doctors. All these years later, it has now become a point of pride among surgeons - they don't want the Dr title back.
Sorry for the mini history lesson (and also the thread hijack, OP!), but I hear the "consultants are Mr not Dr" misunderstanding all the time and it's one of my pet peeves. 
As you were.
(Sorry OP, no advice to give you beyond what others have already said, but good luck!)