They were on the run for two months before their arrest (Picture: PA)

Constance Marten and Mark Gordon have been further arrested on suspicion of gross negligence manslaughter, as the search for their newborn baby continues.

A huge hunt is underway in Brighton after the couple was finally found by police last night after nearly two months on the run – but didn’t have their child with them.

They were arrested at around 9.30pm on Monday on suspicion of child neglect.

In a press conference today, Detective Superintendent Lewis Basford announced they have now been further arrested on suspicion of gross negligence manslaughter.

He said police had to consider the possibility that the child had ‘come to harm’, given that the pair had now been in police custody for a ‘significant period of time’.

He said: ‘We have had a significant period of time in custody facility with both Constance and Mark.

‘At this time we have not furthered that information, which has now obviously led to the position where we feel that the risk is getting so great that we now have to consider the possibility that the baby has come to harm.’

The missing child is thought to be two months old, but hasn’t received medical attention since their birth.

The couple has been moving around the country, paying for everything in cash and covering their faces when on CCTV.

Officers from the Metropolitan and Sussex police forces are searching a huge area of land to try to find the baby.

This is a breaking news story, more to follow soon… Check back shortly for further updates.

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They were on the run for two months before their arrest.