"The concoction he [Churchill] grew to like was, Jock Colville said, more akin to mouthwash than a highball. It barely qualifies as “scotch and water.” "
Gee, Listerine mouthwash is (or was, I haven't checked lately) about 25% ethanol, the approximate equivalent of 100 proof scotch mixed half and half with water. That's a pretty respectable scotch and water.