Mr, Mrs or Miss ...

[carolanne5]

You know how when you register for something online the title box usually gives you a choice of Mr, Mrs or Miss?  Well at the Natural History Museum website you get the choice of ...

Mr
Mrs
Ms
Miss
Master
Doctor
Professor
Sir
Lord
Reverend
Baroness
Brother
Canon
Captain
Commander
Councillor
Colonel
Eur Ing
Flight Lieutenant
Lieutenant
Lieutenant Colonel
Lieutenant Cdr
Lieutenant Cmdr
Major
Mlle
Madame
Princess
Prof
Group Captain
Lady
Corporal
Lance Corporal
Herr
Honorable Alderman
Reverend Canon
Right Honourable
Right Reverend
Senator
Squadron Leader
Wing Commander

I'm stuck between choosing Princess or Squadron Leader ....