How to encourage more women to cycle?

But aren't female deaths disproportionately (sp?) higher than men and more women HAVE been killed under lorries/turning left?

No. There was one year when female deaths were higher, every other year it's been more men - but we're talking really small numbers here - by which I obviously don't mean they're any more acceptable, I just mean I think it's an arbitrary characteristic that's about as useful as saying people with blue jumpers are more likely to be run over.