...called that he was entering the runway ready for take off,and was so cleared as the ATC is advisory only!!
...and was cleared for immediate take off
As the ATC was only advisory,we felt it to be the Pilot's gross bad manners as opposed to the lack of foresight of the controller.
There seems to be considerable confusion in the original post about what air traffic service is/was provided at Duxford. As alphaalpha says, it is FIS - so the voice on the RT is a FISO, not a controller, there is no such thing as "advisory ATC", and the Harvard would not - or certainly should not - have been given any take-off clearance, immediate or otherwise.
2 s