Sorry just noticed that you seem to be saying that Insurers are recognising that LOL can be due to Organophosphate poisoning?
The guys I know when visiting the Doctor where eventually following blood test results OP poisioning was confirmed were instantly grounded by the CAA pending further investigations.
Those investigations confirmed they were suffering from OP poisioning, the effects of which the CAA then decided to suspend the medical.
The LOL insurers are paying temporary benefits only for the reasons I stated.
Of course those individuals cannot really prove where they got the posioning, what they are suffering can be clealry confirmed, believe me it is not good.
Again, no one seems to want to recognise the problem and Balpa, for sure, have not been supportive of those who have sadly lost their living from flying.