In addition to this, there is an interesting line in the story at
Missing mum of two seen 'laughing and joking' moments before she disappeared
"She went on to say two other dog walkers later came across her phone and recognised the screensaver photo.
She said they were
unable to unlock the phone and contacted a friend who then called St Michael's-on-Wyre Church of England Primary School, where Nicola had dropped her two children earlier that morning".
If they were unable to unlock the phone, would it still be possible for phone to be connected to the team work call? It have been reported in various outlets that the phone was found on a bench still connected to said call?