New CCTV footage has been released amid the urgent search for a missing aristocrat, her rapist boyfriend and their new-born baby.

Constance Marten, 35, and her partner Mark Gordon, 48, have been travelling around the UK since their car was found burning on the M61 in Bolton, Greater Manchester, on January 5.

Authorities believe the couple have been sleeping rough in a blue tent, and fear for the safety of the baby who has not had any medical attention since birth in early January.

Police believe the family could be anywhere in the UK at the moment.

Two CCTV clips were released late last night of sightings of Marten, Gordon and their child in Newhaven, East Sussex on January 8.

The first piece of footage was taken from a petrol station on Avis Road, and shows the couple carrying numerous bags at 5.18am.

In the second piece of footage, the pair are hastily walking past a home on Cantercrow Hill around 6.25am on January 8.

The second, from a house camera on Cantercrow Hill, Newhaven, showed the couple carrying what are presumably the same bags, walking speedily down the road an hour later at 6.25am.

The couple, circled in red, were seen opposite a petrol station in Newhaven (Picture: South Coast News)

Ms Marten and Mr Gordon could then be seen in the background of a house CCTV camera

Detective Superintendent Lewis Basford said: ‘We know… they had a large amount of cash available to them. And we still believe that they will have cash available to them, as of today.

‘But we also know that with a newborn baby comes the requirement for the items that they require, and also, just day-to-day living for both Constance and Mark. We know they’re coming to a position where that cash will be coming to an end.’

He added that officers have ‘viewed more than 660 hours of CCTV’ as part of their efforts to find the missing couple.

Yesterday Shereen Nimmo, director of midwifery for Barts Health NHS Trust, made her own direct appeal to the family.

Mark Gordon and Constance Marten (Picture: Met Police/SWNS)

She said: ‘Constance, my name is Shereen and I’m here to speak to you as a midwife and a mother. I am not here to judge you but here to help you and your baby.

‘I know that you really love your baby, and I know what an exciting and worrying time being a mum can be. And I want to make sure that you and your baby are OK and get the care you need.

‘After you have a baby, midwives are there to check you are recovering physically and emotionally and adjusting to caring for your newborn.

‘We check your baby is feeding properly and putting on weight, and they have screening tests to make sure their heart, hearing, hips and eye sight all look OK.

Constance Marten and Mark Gordon have hidden their faces on camera (Picture: Metropolitan Police)

CCTV of the pair on Whitechapel Road in London (Picture: Met Police/SWNS)

‘We also check for some rare conditions and put care plans in place to support them if needed.

‘But it’s not too late to have these checks done and to make sure your baby is healthy.

‘You’re putting your baby at risk by not accessing medical care, so it’s really important that you come and see a midwife, doctor or another healthcare professional as soon as possible.’

The missing couple have so far avoided being traced by the police by moving around frequently and keeping their faces covered in CCTV images.

Constance Marten’s wealthy family have desperately appealed for her to return home

The aristocrat was a promising drama student when she met Mark Gordon in 2016

A £10,000 reward is on offer for information that leads to them being found safe.

Investigators said that in the months before they vanished they built up a significant amount of cash and used it to pay for places to stay and taxis around the country.

The couple travelled from Bolton to Liverpool, then to Harwich in Essex, then to east London and then to Newhaven in Sussex, where they were seen near the ferry port on January 8.

In an update earlier this month, the Metropolitan Police said they believed the family may be camping in Sussex.

But now it is thought that while there is nothing to suggest they have gone abroad, they could be anywhere in the whole of the UK.

Mr Basford said: ‘We know from their movements from the 5th to the 8th of January that they’ve been across the United Kingdom, and I think now, six weeks on, my plea to members of the public is they could be anywhere within the United Kingdom, in any town, in any city.’

Miss Marten, who is from a wealthy aristocratic family, was a promising drama student when she first met Mr Gordon in 2016.

Since then the couple have led an isolated life, and in September, when Miss Marten was well into her pregnancy, began moving around rental flats.

Gordon served 20 years in prison in the US for rape and battery committed when he was 14.

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The couple can be seen hurrying past a petrol station and houses while carrying heavy bags.