No doubt all of us who knew what really happened have seen fit to draw a respectful veil of silence over dead_pan’s earlier mention of the highly secret Wiggins Aerodyne development, which was so tragically terminated.
That said, were I forced to pick a winner from all the splendid and much-loved aircraft thus far suggested, it would land - by a very short head indeed! - with Nutty’s offer of the (similarly named, but totally different) Fairey Rotodyne.
Oh, what a sad setback to military aviation was the political squashing of the Rotodyne project (and to civil for that matter - but for being a bit noisy, which wasn’t seen to be too big a problem back then) ... and, like so many others, to the once-proud UK aircraft industry.