This very performance - the UK premiere - has now emerged on youtube.
Though I have loved the Goldberg Variations on the Harpsichord [Helmut Walcha on Warner nowadays and still available after six decades] for over thirty years, this arrangement by the avant guarde Polish composer, Józef Koffler in 1938 is for me one of the very few orchestral arrangements of Bach keyboard music, which really works well in respect both of the original musical invention and as a newly transformed piece.
I have to say this is the most exciting musical discovery for me so far this year.
Best wishes from George