Former deputy Senate President Ike Ekeremadu and Wife, Beatrice Nwanneka Ekweremadu have been remanded in custody and will appear at Uxbridge Magistrates' Court later today.
They are both charged with conspiracy to arrange or facilitate travel of another person with a view to exploitation, namely organ harvesting.
The Met said a child has been safeguarded. Scotland Yard has not given the gender or the age of the child - or the location of the arrests.
But given the suspects are appearing in court in Uxbridge, it is likely they were held at the nearby Heathrow Airport.
Organ harvesting involves removing parts of the body, often for commercial gain and against the victim's will.