Thanks everyone
Terracotta, these go dormant and need cold over the winter. I keep the dormant bulbs in my greenhouse which has a 5C minimum over the winter.
Once they are starting to show signs of growth I pot them up and bring them in and they get a min of 15C but more often closer to 19/20C. I've heard some folks in the UK grow them outside for the rest of the year but I keep them back in the greenhouse once it get's warm enough. The UK is not massively hot, probably ranges between 15C and 25C over the summer.
I've never bothered about humidity, it's not that high here and I don't think it matters for these.