NIG's managing director of commercial lines Charles Earle has made a shock departure from the company.
He left the insurer on Tuesday, with no explanation given by the company as to the circumstances surrounding his decision.
But in July NIG announced a major restructuring of its management team. It is to merge its personal and commercial lines businesses, leaving several middle managers facing an uncertain future.
An NIG spokeswoman said: "Due to confidentiality agreements signed between both parties we cannot comment on [Earle's] departure."