Re: Concrete Tornado
Ferranti made their parts for the Tornado nose cone radar but GEC were late with their parts of the same system. As a result, some early Tornados flew with a chunk of ballast, instead of a nose cone radar. Some radars of that period had names like Blue Parrot and Blue Fox, so some decided to name the Tornado radar ballast as Blue Circle (after the cement) and joked that this radar had a more consistent performance than others. However, the ballast was actually made of lead.