[Jason P]

Hi Davis – I work for BUPA and I can tell you that if you are a BUPA member in the UK and are diving in the UK, then most schemes do not have any exclusions for sports injuries or dangerous sports - so an accident in the UK would be eligible for cover.
In practice, most serious accidents in the UK will require accident and emergency treatments through the NHS. However, once the condition has been stabilised it would normally be possible to continue treatment and recuperation at a private hospital.
Under these circumstances, BUPA would cover the private element of treatment but a few schemes exclude this - so check your policy documents.
For diving abroad, a BUPA Travel Cover insurance policy (sold separately) does provide cover subject to some conditions - these are 1. you must dive with someone who is qualified (eg. PADI Open Water Diver) and, 2. the dive must not exceed a depth of 30 metres. If these conditions are fulfilled then a BUPA Travel Cover policy will provide full medical cover.
If divers are diving beyond 30 meters then this is regarded as a more specialised area of the sport (e.g. non-recreational) and those divers should seek either an endorsement from their insurance provider or purchase a policy aimed specifically at the diving community.

Hope this helps !