Dalek
Evidence?
There were many parameters preserved which, combined with knowledge of local area and relating it to practical navigation, pointed to a deliberate approach (can't go through it all just now - makes for a 50 page report).
Use of a particular system was predicted as the only rational explanation and it was only subsequently that the fit of this kit was confirmed.
In science, the discovering of something that the theory predicted is termed QED -sort of proves the theory.
You see, there was just too much data to hide the truth - another reason why it was so important to put a lid on inquiry by blaming the pilots "beyond any doubt whatsoever".
Look back at the original story put out by the RAF - at the very least, analysis of the available data rubbishes that story. Does objective analysis constitute "evidence"? Perhaps not, but it should allow an inquiry to ask the right people the right questions.