As the Reds will fly 7-aircraft displays this year, it appears that another pilot loses his place on the team, and may only join the Reds for the 9-ship flypasts. After all the application & selection process and the winter training, to lose your place in the full displays through no fault of your own must also be difficult.
I would guess that it may be Red 8 Dave Davies, which would leave Gypo just as a Synchro Pair and Enid with the full five. This would have been his fourth year with the team anyway so the disappointment might be slightly easier to take.
Again I'd take a reasonable guess that he and Red 10 Mike Ling would make up the numbers in a nine ship flypast.