As the search for the missing baby of an aristocrat and her partner is underway, a timeline has been released since police first appealed for information.

Here is a timeline of what has happened since Constance Marten, Mark Gordon and their baby disappeared in January:

January 5 – 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.

January 6 – they take a taxi to Liverpool and then onto Harwich, Essex, at around 3.30am.

January 7 – 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.

The Bolton News:

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 near Brick Lane, east London, and take a taxi to Haringey in north London.

January 8 – At 1.25am the couple take another taxi from Allison Road, Haringey, all the way to Newhaven ferry port in east Sussex, where they are dropped off at 4.56am. They walk to where the A259 crosses over the B2109, and are seen sheltering from the rain under an overpass at around 6am.

At around 6.15am they walk along Cantercrow Hill into the fields beyond, carrying a number of bags and their blue tent.

January 9 – Essex Police briefly take over the investigation due to the sightings in Harwich.

January 12 – the Metropolitan Police take over the investigation once it is confirmed the couple travelled to east London.

January 18 – the force makes a public appeal for help finding the family, revealing that Mr Gordon is a convicted sex offender who served 20 years in a US jail for rape and battery. They also say the couple have enough cash to live off-grid as they avoid the police.

January 19 – Miss Marten’s father Napier Marten appeals through the Independent newspaper for his daughter to hand herself in, saying: “I beseech you to find a way to turn yourself and your wee one in to the police as soon as possible so you and he or she can be protected.”

January 24 – Police repeat their concerns for the safety of the baby, saying they believe the couple are sleeping rough in freezing temperatures.

January 31 – A £10,000 reward is offered by the Metropolitan Police for information leading to the family being found safe.

February 7 – Constance’s mother Virginie de Selliers publishes an open letter to her daughter, pledging to support her and telling her “you are not alone”.

February 21 – the Metropolitan Police make the latest in a number of public appeals to find the family, including a plea from midwife Shereen Nimmo to Miss Marten to get her baby medical attention.

February 27 – 9.30pm the couple are arrested in Brighton on suspicion of child neglect after a tip-off from a member of the public.

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It is unknown if their baby was full-term or has any health issues.

Anyone who may be able to assist in the search for the couple’s baby is urged to contact 999.