Written by Elvis Costello and Clive Langer for Robert Wyatt, Shipbuilding was recorded in several versions by Elvis Costello himself, Suede, June Tabor, Hue and Cry, Tamsin Archer and The Unthanks.

The blend of subtle lyrics and extraordinary music makes this a political song like no other. It transcends the particular circumstances of its writing: the Falklands War and the decline of British heavy industry, especially ship-building.

Clive and Elvis describe how the song was written in 1982 and how legendary jazz trumpeter and flugelhorn player, Chet Baker, came to perform on Costello's version.

Philosopher Richard Ashcroft wants the song, which he sees as a kind of secular hymn, played at his funeral because it gives a perfect expression of how he believes we should think about life. Not being able to feel the emotion of the song would, he feels, be like being morally tone-deaf. If you don't like this song, he'd find it hard to be your friend.

The song's achingly beautiful final couplet about "diving for pearls" makes former MP Alan Johnson cry.

Other contributors include Hopi Sen, a political blogger who was an unusually political child, and the Mercury Prize winning folk group The Unthanks. They toured their version to towns with ship-building connections as part of a live performance of a film tracing the history of British ship-building using archive footage.

Series about pieces of music with a powerful emotional impact

Producer: Natalie Steed

First broadcast on BBC Radio 4 in March 2013.