Balens Insurance - does all sorts of insurance for therapists and specifically Mediums and Readers from around £80 for the year. Their website is www.balens.co.uk and their phone number is 01684 893006
I use Karen Thomas from Breathe Insurance and here is the contact form for her website. Her phone number is also on there but it's 01622 620531
Craft Cover do specific insurance for crafters, I haven't personally tried them, but do have a recommendation for them.
We use these boards from the Panel Warehouse. We often use these instead of a pull up banner - they are versatile and you can print out, laminate and tell a story about what you're up to.
Create Your Own Designs
Canva is designed to be used by non-techie people to create their marketing material. You can use it for free and it has templates for social media posts, leaflets, cards, logos and really everything you need to market your business both online and offline. Go to Canva
You know those big waterproof banners you can strap around the corner of a building? Well, they are also excellent for wrapping around a table. Plus, there are very hard wearing indeed. These start from around £20 and they will do the art work for you as well. https://www.eazy-print.co.uk/