You could also just get 3rd party insurance if you don't mind carrying the risk to the boat yourself. This will satisfy most harbours. marinas etc & protect against injuries to passengers/ crew or other vessels.
I went thro' a broker (Desmond Cheers) I gave them my requirements & they found a suitable insurer. When my premium shot up this year I looked around myself & found a cheaper company & they went back to my insurer & negotiated a premium reduction.
-------------------- Boaty junk clogging up your shed or lockers? Chuck it in Marinaskip