Tread carefully. As the Serengeti a Limited Edition, is it wise to festoon you'r vehicle with these badges.? May seem very trivial but insurance company's will use any excuse not to pay out. They will argue you never declared it was a Limited Edition which "may" have affected you'r premium at the renewal stage. You say, "it's not,I just put the Serengeti Badges on." Then they will state that you should have declared you have fitted the badges, giving the impression of a Limited Edition as this "may" also have affected you'r premium.
Trust me, they will do ANYTHING to avoid paying out.Even stating the vehicle has been "modified" to replicate a Limited Edition.
Give them a call.They may say it's fine - no worries.But it's safer than them not paying out on a technicality if the worst should happen.