The "Proving Trial" of K7. This was clearly set out in the Coniston Water Bye Laws dated 2010. Permission could be given by the Park Authority to exceed the 10mph speed limit to conduct the "Proving Trial of K7", The LDNPA defined the craft (K7) and the various parts of the 'Proving Trial'. The latest Coniston Water Bye Laws (dated 2020) have no need to separately describe the K7 Proving Trial, because there is a process for anyone to apply to operate their powered craft above 10mph, should they apply soon enough.

These words have appeared in the annual report from the Trustees of the Coniston Institute and Ruskin Museum up to 2016 - "The Trust owns the wreck of the Bluebird".