The £100,000-a-year account is currently at long list stage and the deadline for entries is 11 July.
Incumbent agency Manning Selvage & Lee has held the account since March last year and has been invited to repitch.
The appointed agency will report into UK head of communications Jon Sellors.
The account excludes the Group's More Th>n brand which was awarded to Cow PR in November last year.
UK external communications manager Simon Kutner said the corporate and business-to-business activity would include a large focus on the broker business. The chosen agency will also be charged with addressing larger insurance issues including fraud.