I realise that it may be pushing it a bit for this year, but I have been looking into Vegan/Dairy Free advent calendars for Hannah. A number of places have mentioned Kinnerton as a source for such a thing, but not mention of how to obtain one. As I contacted Kinnerton and got a response, I thought I would share it to save others from having to waste precious days just getting information.
Essentially, Kinnerton do a special Dairy and Nut Free advent calendar in limited numbers that they send to people who order one. They do it as a non-profit thing, but ask for postage costs and a donation that they then pass on to the Anaphylaxis Campaign. I enquired and was sent an order form in MS Word format. I have turned it into a PDF and attached it here