Day-by-day timeline of Constance Marten and Mark Gordon's disappearance as desperate search for baby continues

A desperate search to find the baby of Constance Marten and Mark Gordon is continuing today, amid fears from police that the infant may have come to harm.

The pair - who went missing after their car was found burning on the M61 in Bolton in January - were arrested on suspicion of child neglect after being stopped in Brighton on Monday following several weeks on the run. The baby was not with them.

Marten, who is from a wealthy aristocratic family, and Gorton, a convicted sex offender, were then further arrested yesterday on suspicion of gross negligence manslaughter. Police believe the baby has not been seen by a doctor since birth.

READ MORE: Constance Marten and Mark Gordon further arrested on suspicion of gross negligence manslaughter as search for baby continues

As the huge search for the baby continues, here is timeline of what has happened since the pair disappeared in January:

An investigation is launched by Greater Manchester Police after the couple’s car is found on fire and abandoned on the hard shoulder of the M61 in Bolton.

Investigators discover the family walked away from the car to the Anchor Lane Bridge.

They take a taxi to Liverpool and then onto Harwich, Essex, at around 3.30am.

They are seen by a member of the public in Harwich at around 9am. Later that day, they are caught on CCTV near London’s East Ham station between 10.30am and 12.30pm.

From there they take a taxi to Whitechapel road, getting dropped off just before 6.15pm.

It is here that Mark Gordon goes into a branch of Argos alone and buys camping equipment including sleeping bags and a two-person tent.

The couple walk around the area for a few hours unsuccessfully trying to flag down taxis. Shortly before midnight they dump their buggy