Allied Navies and Merchant Shipping Smoking Ban WWII

After seeing a Battle of the Atlantic special last night where an entire convoy was found thanks to a smoking sailor, I wonder if there was any effort to ban cigarettes entirely and replace them with issues of snuff or chewing tobacco to avoid creating a light.
 
Did it mention which convoy? I mean I suppose it's possible, but I would think that if they were close enough to see a sailor smoking, they'd probably be close enough to have seen some other signs, like a light on at an inopportune moment.
 
Did it mention which convoy? I mean I suppose it's possible, but I would think that if they were close enough to see a sailor smoking, they'd probably be close enough to have seen some other signs, like a light on at an inopportune moment.

Or even the great ruddy plumes of smoke from the funnels.
 
Or the phosphorescence churned up by the ships wakes

Was that an issue with subs? (genuine question). My initial reaction would be they would not be high enough to see it.

Obviously aware of it with searching aircraft spotting it.
 
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