Having done a course on the correct use pyrotechnics years ago which I found very beneficial, i always discharged mine on bonfire night or did and considered it as a refresher course, anyone can buy flares and never discharge them until the s... Hits the fan which isn't ideal so my take on it is I discharge inland on a night when they cannot be singled out and follow the instructions with as close to the expiry date as possible.
Now all electronic
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