Without 5 years experience of the commercial market it is unlikely that you will have the technical credibility to work with the Clients in the corporate department of this well known Employer.
However if you do have a background of working closely with a range of commercial clients handling all their insurance needs then this could be your opportunity to really benefit from that hard work.
You will be a confident professional able to secure markets for your clients and to present a positive impression of competence to your principals.
While you may be CII qualified your most important attribute will be your technical understanding and knowledge of the market.
This then would be the Employer to recognise your experience and reward you for that and give you an environment in which you can play to your strengths.