The commentary doubles as a synopsis, and is reproduced here in full:

Tom Lancashire is a miner. But after work, he's treasurer of the Aylesham Working Men's Homing Society in Kent. Like many miners, he races pigeons.

This weekend he's entering Atomic Mealy for a big race. Each bird is numbered for the race with a rubber ring. The Pigeon Special brings 15,000 birds from all over the country to the liberation point. They will be released in 10-minute batches.

After the race, speeds are worked out in yards per minute, and the winner is the fastest bird. During the war, pigeon fanciers all over the country lent their birds to the government for special service. Many were lost, but some returned from the Continent with valuable information.

They're off! Tom's bird amongst them. A hundred and fifty miles away, Tom's bird circles for a landing. Atomic Mealy is in! The ring is slipped off, put in a cylinder and locked in a clock which registers arrival time. Tom's bird may be the winner when its speed has been calculated. In the meantime... work again on Monday!