Thank you for the question. This is really down to the insurers, however, there are two factors, firstly, if the growing of cannabis, etc. contributed to the fire being started then I do not imagine they would pay out as this would be deemed unsafe practice. Secondly, there is likely. to be a clause (which you will require to check) to state that part of the agreement will be that the dwelling is not used for any unlawful activity, with that being the case (and the insurers will check the fire/police report) they are unlikely to pay. Obviously if this was your insurance, and were unaware of what the tenants were doing, this moves us into a grey area, whereby the tenants would be liable for the costs of the damages. If that was the case, then you would need to look at taking court action against the tenants. I would exhaust the process with your insurance company ( assuming it is your insurance) in the first instance. It may be the case you will. require to take action against the tenants.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
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