If Sheila did nothing after 3.48am, then she did everything between 3.10am/3.26am - 3.48am. Which was impossible to do.
Bamber is not sure whether it waa 3.10am or 3.26am. Publically he says Neville called the 5th furthest police station at 3.26am. Privately he didn't include it in his 2012 CCRC submisssion.