“A tontine is, in point of fact, a lottery — a lottery, plain and simple, gentlemen. Into this tontine each parent or guardian has placed for each of you, and in your name, the sum of one thousand pounds sterling. The sum so constituted is to be administered by a self-perpetuating board and held in trust by them for whomsoever survives. This £20,000 will grow and grow under astute management who will charge but a nominal fee, and this — by then — great sum will be handed to the one amongst you who is the last surviving member of the tontine. It is as plain and as simple as that.” So the premise is laid out at the start of Bryan Forbes’s 1966 film The Wrong Box, though “plain” and “simple” are hardly the right words for the farce that follows.