Thanks for all the replies, through much research I finally found a company who are actually happy to insure all craft tools etc materials etc in what ever place they take place. They will cover also cover Public and products liability even if you are only selling 1 piece a year which is great the company name is: www.
http://craftinsurance.co.ukthey covered my lathe and tools and public and products liability to the tune of £1,000,000
the only thing they will not cover is the building itself which is covered by ouse insurance.
It was cheaper than some of the other suggestions but not excessive its a family run business covered by Hiscox they are great to talk to on the phone as well being a small company.
I had never considered insurance for the products I produce either.
Hope this helps others in the minefield of insurance