As companies have consolidated into groups, the top 20 has changed dramatically in just four years.

1997
1. Royal & SunAlliance
2. CGU
3. Zurich
4. Guardian Royal Exchange
5. Norwich Union
6. Cornhill Insurance
7. New Hampshire
8. ITT London & Edinburgh
9. Direct Line
10. Axa Provincial/Axa Ins.
11. Consolidated Financial
12. Gan/Lombard
13. Independent
14. NIG Skandia/Hibernian
15. Co-operative Insurance
16. NFU Mutual
17. Prudential
18. Lloyds TSB
19. Iron Trades
20. Bishopsgate

1998
1. Royal & SunAlliance
2. CGU
3. Norwich Union
4. Zurich
5. Guardian Royal Exchange
6. Cornhill Insurance
7. Bupa
8. New Hampshire
9. Direct Line
10. Axa
11. Gan/Lombard
12. Consolidated Financial
13. NFU Mutual
14. Independent
15. CIS Co-operative Insurance
16. NIG Skandia
17. Lloyds TSB
18. Prudential
19. Bishopsgate
20. Churchill

1999
1. CGNU
2. Royal and SunAlliance
3. AXA
4. Zurich
5. Cornhill
6. Direct Line/Privilege
7. Winterthur
8. BUPA
9. AIG Europe
10. NFU/Avon
11. Groupama
12. GE Financial
13. QBE
14. Independent
15. Fortis
16. Lloyd's TSB
17. Co-operative Insurance
18. Prudential
19. SR Int'l Business Co
20. Legal and General

2000
1. CGNU
2. Royal & SunAlliance Group
3. AXA
4. Zurich Financial Services
5. Direct Line/Privilege/UK Ins
6. Allianz
7. Winterthur (Credit Suisse)
8. AIG
9. National Farmers Union
10. GE Insurance
11. Fortis
12. Co-operative Wholesale Soc
13. Groupama
14. Swiss Re
15. Lloyds TSB Group
16. QBE Insurance Group
17. Prudential Group
18. Legal & General
19. The St Paul Companies
20. Munich Re