bluebear clarified in one of emkana's threads that a certain consultant was a Dr not a Ms... I thought the distinction was based on seniority etc. and the all consultants were addressed as Mr / Mrs etc. but it turns out the differentiation is on whether they are a physician or a surgeon (if I have understood things correctly from my googling).
Quite interesting (if a tad pedantic)...
"In the UK, the division of physicians and surgeons into `doctor' and Mr derives from the medieval origins of physicians as educated graduates, and the surgeons as apprentices (usually for 7 years) of barber-surgeons... In France, the first official organization of barber-surgeons was founded in Rouen in 1096. A similar organization was formed in London in 1308,5 and it was not until 1745, that George II separated the barbers and surgeons by an act of parliament, and in 1800 that the Royal College of Surgeons was formed in England."
\link{http://www.jrsm.org/cgi/content/full/99/4/197\Source}
Did everyone else know this ? I've always been highly unsure of the distinction between the two titles !