(Hubert) Leslie Woodgate (1902-1961) was organist of several London churches and was later chorus master to the BBC.
Most of his compositions are choral, but he published several organ compositions, including "Impromptu," which was published by Ascherberg, Hopwood and & Crew, Ltd. in 1948.
The whole Impromptu was wonderfully played by Agnus_Dei last year ( https://www.contrebombarde.com/concerthall/music/36000
). In his description he said “I suppose you could play the central section alone if you wanted to, and it's nice enough to do so, but it fits in the middle so nicely, that you really should do the entire piece.”
Well, the entire piece was much too difficult for me, but I tried my best with the extended central section marked "Meno mosso" adding a little cadence to it. And I transposed it (my fingers didn’t enjoy the original 3 sharps). Just in case someone wants play this shortened version as well - I attached the score.
Lacking of a suitable 3-manual English organ I used the AVO-Aeolian Skinner, where I found colours I liked for this little Trio, played as a little thank you for all the marvellous pieces Agnus_Dei has presented to us in the last years!