Fortis is set to further expand its commercial products range after improving gross written premiums (GWP) in the sector by more than 10% in the last year.

The insurer delivered an overall 13% increase in GWP to £335.7m in the second quarter of 2006.

In commercial lines, which include van insurance and a care home proposition, GWP was up to £33.4m from £28.6m a year earlier.

Barry Smith, chief executive of Fortis, said he would "look to expand" its commercial division through "product innovation".

Fortis' personal lines portfolio suffered only a slight decrease in its motor GWP from £189.8m last year to £189.6m in the second quarter of 2006. Despite this, the insurer added a further 75,000 clients to its customer base.

Household made the largest contribution, increasing 53% on the back of affinity wins such as the Age Concern account. In the second quarter, household GWP increased to £81.6m from £53.3m, accounting for 24% of the insurer's business compared to 18% last year.