Blue Peter is a popular, long-running BBC television programme for children. It is shown on Children's BBC, both in its BBC One programming block and on the CBBC Channel.
It is named after the blue-and-white flag hoisted by ships in port when they are ready to sail. The reasoning behind the choice of title is that the programme is intended to be a voyage of adventure and discovery for the viewers, constantly covering new topics.
The signature tune, in recognition of the origin of the title, is a sea shanty called "Barnacle Bill", and the programme's motif is a stylised sailing ship designed by Tony Hart. Hart's original design was never successfully used in a totally uniform fashion, with several different reproductions used in studio, on badges, the Blue Peter books and on-screen graphics. This was until the show's redesign in 1999, when the ship's rigging and hull detail was removed, and in 2000, the flags were subtly reshaped. This version is still in use today, and now appears across all media (although the revised badges retain the old-style flags).