Police searching for a mates and their newborn babe said they "do not privation to interrupt their household life".
Constance Marten and Mark Gordon person been missing since their car broke down connected the M61 adjacent Bolton connected Thursday.
Police said Ms Marten had "very recently" fixed commencement and neither she nor the babe had been assessed by aesculapian professionals.
Officers said the ongoing hunt was "primarily to guarantee the payment of the couple's child".
There person been reported sightings successful Essex - adjacent Harwich Port and successful Colchester.
Essex Police is present starring the hunt for the couple, some primitively from London, and their baby.
Det Ch Insp Rob Huddleston said constabulary "do not privation to interrupt their household beingness - this hunt is chiefly to guarantee the payment of the couple's child.
"We are carrying retired a fig of inquires successful and astir Colchester successful bid to find them. We're besides liaising with colleagues astatine British Transport Police astir imaginable onward question from Colchester.
"I would inquire the radical of Colchester, and so wider northbound Essex, to delight familiarise yourself with Mark and Constance's faces and study immoderate sightings to america immediately."
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