Insurance....

I'm an occasional diver and my girlfriend has never dived before.
We're off to Florida in a couple of weeks for a couple of weeks and we
hope to get a couple of dives in for me and an introductory dive for
her. We've got bog-standard travel insurance via my bank, but it
excludes diving (horse riding, skiing and snowboarding are covered
though!).

Can anyone offer any advice on single trip cover for when we are
diving? We have no kit beyond masks, fins and snorkels so cover for
equipment isn't necessary.

The stuff I've seen online looks horribly expensive (minimum of £60
each) which seems a lot for a couple of dives.

Any help would be appreciated.

Cheers,

Jason.