Think on this evidence. Two people missing at 9.10pm. Mrs Carpenter is alleged to have heard someone calling 'Madeleine' some time between 9.15-9.30pm. The chef finds the table empty at 9.40pm......
Compare the 'official' evidence.
Gerry and Jane checking at 9.10pm. Dianne in the loo? (she said she visited it) so three couples at the table. An empty table with belongings on it? Dianne left the belongings when she went to 5A the first time, then went back for them.

All things are possible at the moment. I'm thinking we need to go back to the bookings at the Tapas Restaurant that night and see if there was another table booked for 3 couples. Could the place where the Tapas 9 were seated be called the "esplanade".
Different number of couples.
Different place (location of the table).
Different time for the alert.
Clothing left behind (I haven't heard of that for the Tapas 9).
No Dianne Webster (If she went to the loo it was not after the alert for her job was to be there if Madeleine was found in the area.)
Looking at the photo where was the cooking done? In the bar area or not?