When we took over NAUTILIA from Dr Vic, we continued with his insurers Nautical-Insurance.co.uk of Leigh-on-Sea, whom he’d selected after careful comparisons.
I carefully checked whether they covered solo sailing, and for a small excess they cover me for single-handed sailing, and they also extended the standard, typical motor-sailing range from Brest to the Elbe.
They’ve been very helpful, cover the machinery and dinghy as well as the hull and sails, offer legal cover, and have various paragraphs about inexperienced sailors as long as they’re under the supervision of an experienced sailor. I get a handy No Claims Bonus from them, and I’ve been very satisfied with their attention to detail. However, I’ve never made any claim, so I can’t say how well, or not, they deal with claims.