Top insurance broker Marsh is overhauling its marine business but says there are no plans to scale back operations.

The revamp has attracted market gossip but Marcus Baker, the head of Marsh’s global marine business, said the broker would still be a leader in the sector, fielding a 600-strong team.

Baker was reluctant to use the term "restructuring" for the process under way, but said the broker was looking at all aspects of its business and everything was up for negotiation.