That sounds fantastic Claire! They obviously really appreciate you and your work.
If you haven't already done so, you may want to consider (finances permitting) checking out the style advisors at David Jones or Myers. I went to DJs and spent four hours going through various clothes. OK, I spent a bomb, but you've probably got more willpower in tgat area than me. You do get an independent view of what may/may not look good in a work or more casual setting. I booked for a Sunday morning - it was quiet and I got lots of time :)p
If you have any questions on it I'm happy to talk, text or whatever.
It's going to be great - the nerves are normal, so don't worry!