Royal Bank of Scotland Insurance (RBSI) said the acquisition of Churchill boosted its contribution by 55%, or £140m, to £395m for the first six months of 2004.
Total income was up 89%, or £1.13bn, to £2.4bn. Excluding Churchill, total income grew 17%.
After reinsurance, insurance premium income was up 105%, or £1.23bn, to £2.4bn. Excluding Churchill, insurance premium income (net of reinsurance) grew by 18%.
RBSI includes Churchill Insurance, which it acquired in September 2003, and Direct Line Group.