If the searching started at 10:20, that's entirely different from saying it all happened between 10:30 and 10:56 but also that practically the last of those things happened at 10:35. Just to quote again the timeline you directed me to, numeration by me:
10:30-10:56 :
(1) FFC ran to AMS’s house, asked if saw little boy in spiderman suit? , AMS said no, suggested bus stop on Crn Benaroon Drive & Batar Creek Rd,
(2) FFC ran to bus stop , heard the “scream” ,
(3) ran back to # 48 Benaroon Drive,
(4) got in FGM car & drove looking for WT, drove down Batar Ck Rd, thought he could not have gotten that far,
(5) went back to FGM house,
(6) ran inside & got her mobile phone, saw message from MFC, she ran out to driveway , just as MFC drove in & asked him “ Have you got William?” . . .
. . .
10:35 : MFC arrives back in Benaroon Drive, meets FFC in driveway asks “ have you go . . .
I maintain again, it is not physically possible to do all of that in 5 minutes. As Laura Beacroft thought William disappeared between 10:05 and 10:15, and the foster family especially FFC were by no means consistent in their accounts (I wouldn't necessarily expect them to be), I don't agree that police would have tested the possibility of specifically this timeline, that FFC went through steps 1-6 in 5 minutes.