Sir Duncan Oppenheim (1904–2003) was for many years employed by British American Tobacco and rose to become the company's chairman. During the war he was a Civil Defence warden in London and painted a number of pictures relating to this. The one below is entitled "Boredom: Air Raid Wardens on Duty". Many of his pictures are held in the IWM archives.
It's well worth reading his obituary that appeared in the Independent.
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