An interesting one, from my Mil ATCO perspective.
To what extent should a Tower controller intervene with regard to visual circuit traffic? Having provided tbe essential information, it is deemed the pilots’ responsibity to sort themselves out ... agreed?
Rightly or wrongly, I was an ‘interventionist’ Tower controller. If I saw something I believed to be ‘not going well’ I would ‘politely/assertively‘ chip in, depending on circumstances. In this case, I would have firmly advised the Spitfire he was too low in respect of the Chinook at the far end of the runway ... long before it became an issue. Would that be wrong?
BUT ... my perpetual beef as a Local Examining Officer was that Tower controllers didn’t look out of the window enough.