this year got commercial policy. about £375, fully comp, no axe-idents, 2 years no claims. told them its for window cleaning wfp with tank, tank classed as load as not bolted so no problem, don't want to know size or anything. got vw caddy, 750 payload, with 650 upright (can fill to 400 to meet legal payload).
is it only a problem presumably if modified, ie bolted into chassis?