Hey, HW, my advice on why the email? Simply because a solicitor's letter alone is rather abrupt. I think she is extending you a courtesy, small and as unwanted as it is.
The tough part will be, I think, to remain civil through the process, but I know you've developed the skills to do so. Again, congrats on the transfer, a chance to truly travel YOUR path.
Your reply looks fine. Have a great time at the party
