We never cover any current or previous drug / alcohol abuse. Therefore they wouldn't be covered for anything relating directly or indirectly to the alcohol / drug abuse but would still be covered for everything else.
You will, however still need to declare the conditions relating to the drug or alcohol abuse and screen them as normal - but advise the customer that these will not be covered. And please add booking notes.
If they are still using we would have to refer this over to the UW.