Tony Stace is an organist we have seen several times in our organ and keyboard club.
Second Waltz
Dizzy Fingers
Buddy Holly Selection
Selection from Phantom Of The Opera
Listening to this one I thought for a minute that Tony was able to 'hold' notes on the upper while he moved his hand down to the right of the split on the lower (which I understand you can do on the Roland), but on looking more closely he is actually transferring the holding of the note from his right hand to his left hand, as can be seen at 3:19 and 4:30; and again at 6.14 and 6.21.
Hugh