The 235's recent escapade inspired me...
A trial for single deck routes to use 2 or 3 double decker buses and monitor if usage has increased.
I would argue this has very much happened with route 355, its usage did increase by a notable margin. The 355 was allocated 4 double deckers due to the fire at Orpington (MB) which killed four of 358's buses.
95 is FULLY allocated hybrid double deckers temporarily... watching its usage next year would be interesting.
Would then be horrible to watch it return to fully single deck operation... again (yes this happened under First).
This would surely make a great experiment.