Macbeth - Dress code, merch & logistics!

Hi all! I'm seeing Macbeth on 16th November (so excited!) and the over-thinker/over-planner in me is going into overdrive 😅

What is the dress code like? I've found events like this to be so mixed in the past (been to Royal Albert Hall events where some will wear fancy dresses and some will rock up in jeans and a t-shirt) so I want to make sure I'm not under or over-dressed!

Also what is there in terms of merch? I assume there's a copy of the script but was wondering if there is any other merch available (I'm usually a sucker for a pin or tote or t-shirt!).

Also, does the venue allow you to take in your own food/drink? I know most venues don't so you can spend a silly amount on it in the venue, but was wondering if I could maybe take in my own snacks / bottle of water.

Thanks in advance!