Matt Oldfield said Kate left at 9:50 to check. Fiona put it between 9:45 to 10. The waiter who served Russell his thin steak said they left the table by 9:50. Just a number of main witness statements suggesting the alarm was raised before 10.
10 was on the first timelines by the group but when closer examined is not credible evidence e.g. Jane said she left at 09:10 - it is 9:20 on the first timeline. Matt said Gerry left straight away after he returned. On the first timeline it is at least 10 minutes later at 9:15

Gerry later said he left to check at 9:04 as an arguido. Amazing how he could remember an exact time 4 months later but not for that timeline. This suggests providing false information from the very start. The PJ should never have said the alarm time was 10pm because there is plenty of evidence to suggest otherwise.

"When asked about the time he went to check the children on the night of Madeleine's disappearance, he states remembering that he did it,
according to his watch, around
21:04. He remembers that once inside the apartment he thought strange only the fact of the door to the children's room being slightly more open than how the defendant had left it when he and Kate left for dinner."
http://www.mccannpjfiles.co.uk/PJ/GERRY-MCCANN-ARGUIDO.htm