Register your food business with your local council they are only there to help you. I had to send my label via email to be approved because of covid restrictions. The lady told me I didn’t need a batch number if I put the date it was processed
It all depends on how thermal efficient your fridge is, the older ones are not that good. If your heater wattage is not enough the honey will take forever to warm and might not even get up to temperature In cold conditions.
I made a PIR warming cabinet, holds one 30 pound bucket and use a 40W tube.