Well, for most of my choices, I had back-up date/times for my choices. For Le Cellier, I had a back-up restaurant.
So for CRT, I chose my 1st date/time which was lunch, then if that wasn't available, it would be for breakfast, then it wasn't for that, then I chose a different day I would be in MK, etc. Then the rest of my choices were dependent on CRT, etc
As for Le Cellier, I had a back-up restaurant and just chose that. I wasn't willing to change my touring plan for it.
Fortunately, I didn't have to change anything. I got my first choice of date/time for everything except Le cellier which I just chose Teppan Edo for the same date/time.