The Cultural Clippings blog recently posted some very interesting examples of early colour Searle illustrations. Originally published in the August 1947 issue of Lilliput Magazine.
HOLIDAY magazine. Obviously less overtly 'cartoony', stylistically they're closer to the drawings of the time by Henry Moore and Graham Sutherland.
Many thanks to Chris for allowing me to re-publish these here on the Perpetua blog. He also sent me another Searle spot illustration from the same issue which I've posted on my Lilliput blog here.