Travel insurance for British / UK residents

Company: Located in UK and established in 1996.
Underwriter: ANV, Lloyd's Syndicate 1861.
Type: Single trip, annual, backpacker, ski and more.
Cover: Medical, personal belongings and legal.
Max duration: 15 months, which can be extended to 18 months.
Pros: Can be taken out while travelling. Most activities are covered, including bungee jumping, scuba diving (max 30m) and trekking up to 3500m.
Cons: Trekking above 3500m can not be covered.

Company: Located in Australia and establised in 2000.
Underwriter: Millstream Underwriting Limited.
Type: Single and family.
Cover: Medical and personal belongings.
Max duration: 545 days.
Pros: Online claiming, can be taken out while travelling and many adventure activities are included.
Cons: Some adventure activities need additional premium, like trekking above 3000m.

Company: Located in UK and establised in 1992.
Underwriter: AXA Insurance UK.
Type: Single trip and longstay that comes in three coverage levels.
Cover: Medical-only or medical, personal belongings and legal (depending on coverage level).
Max duration: 18 months.
Pros: Many price levels.
Cons: Some activities need additional premium, like bungee jumping and trekking above 4000m.