Just had a long conversation with a guy at Grand Prix Racewear about the ISO 6940 standard in the regs.
I was let down by another company who I had ordered some boots through so I've just had to order some from GPR.
Anyway. The ISO 6940 standard was has been superceded by FIA 8856-2000 so any boots with FIA-2000 approval are at or above that standard.
Didn't know if this was common knowledge or not..