I could add at least two other "most wanted titles" to the list, but this is of course a very subjective and personal opinion. The first one is DARBY AND JOAN (1937), directed by Syd Courtenay, produced by Rock Studios and released by MGM-British. It was probably a mediocre movie - according to contemporary reviews - but Tod Slaughter was in the cast, and it's the ONLY "lost" title in his Thirties movies.
The other is THE MYSTERY OF THE MARIE CELESTE, with Bela Lugosi. Of course, the American editing still exist, but is cut to ribbons, to the point that some notable performer like D.J. Williams, credited in this US print, just doesn't appear in it. A truncated print is - perhaps - preferable than nothing, but in this case it's rather frustrating...
And of course there is a LOT of other "lost" British movies, without speaking of the thousands of TV films and episodes foolishly erased by BBC until the mid-1970s (including most of the Sherlock Holmes / Peter Cushing episodes).
