Blue Peter "Sailors Hornpipe" was used instead. The opening theme has been updated several times. The following is a list of all the versions of the "Blue Peter" signature tune, "Barnacle Bill" that have been used on the show : The debut of a new version of the famous theme tune "Barnacle Bill" is sometimes accompanied with an introduction by the presenters at the time explaining the reasons behind the new rendition. Mike Oldfield appeared on the programme around 1979, and his version of the theme tune was so popular with viewers that the producers decided to record it for use as
Barnacle (slang) determine the root cause of the problem. In some cases, manufacturing changes may need to be made such as trace contaminants being introduced during some phase of manufacturing. In other cases, the problem has to do with the design of the product and a change has to be made in the product design. When a product design change is required, often and when possible, a barnacle is designed so that existing products can be modified with the design change using the barnacle. By using a barnacle, the idea is that existing products do not need to be scrapped and replaced