Ask HN: Public Liability Insurance

Despite initial emails indicating otherwise, it now transpires that the event I'm running in November will require me to have PLI. It will be talks, coffee, tea, biscuits, a meal, and some puzzles. No children under 14. Any recommendations for a supplier in the UK? We only need to cover the activities we're providing, not the venue as a whole. All suggestions and advice gratefully received. If you'd like an update about what I discover, comment below and I'll let you know.