I had an old tub and was with Noble Marine for about 8 years.
I thought they were expensive, but stayed with them.
When I bought Small Fry my premium shot up.
After asking the club for advice, I ended up with Porthcawl Insurance. About 1/2 the price of Noble Marine and after asking, they will cover me up to 20 miles out. ( plenty for a Warrior 165 ).
Well worth a phone call.
http://www.porthcawl-insurance.co.uk/
Jim