Having just seen this thread;
I was given the pleasure of taking some engineering apprentices around Cosford in July, with a sort of access permission, to show the new boys examples of the development of aircraft, engines and their (mainly visible) systems. I can confirm that the Brit and the Comet did seem to be well separated from the building site that was the BA Collection.
Incidentally, (IMHO) the Brit was best used as the demonstrator of many types of well advanced corrosion and vegetation. It won’t be about for that long either!
Rigga