Royal & Sun Alliance (R&SA) saw UK underwriting profits jump 60% in the first six months of 2005 to £79m.
Commercial lines underwriting profit soared 71% to £65m, while personal lines produced an underwriting result of £14m up 27% on the previous year.
The UK business's overall combined ratio improved nearly three points to 92.5% from 95.3% in the previous period, while net written premiums improved by 5% to £1.4bn from £1.3bn a year earlier.
