The Queen naturally uses vellum and exquisite calligraphy for formal documents. For private correspondence she prefers a fountain pen and high quality paper (usually 100gms - she considers anything else lightweight!). Eileen prefers a nice flowing roller pen and a nice coloured stationery set. There is no mistaking her distinctive style in both what she says and how she presents it. She is just as blunt on paper as she is verbally. Her vocabulary is extensive too.
Hanastrew considers the invention of the biro one of the best things to have happened around all known dimensions and she always has several of these in many colours on her. She likes nice crisp white lined paper. Her correspondence and style is as business like and to the point as she herself is though when issuing magical fines for relatively minor offences she does let "rip" with her vocabulary as to what she thinks about the offence and offender. Let's just say everybody on the receiving end of this pays up at once. Nobody wants to find out what Hanastrew does as a follow-up.
The Lord Chamberlain has very formal notepaper and uses fountain pens as he conducts the business of the Royu