Scotland Yard surrendered on Wednesday afternoon to the Greek authorities Kyriakos Grivas and his wife Anastasia Vatsika.
The couple was arrested by the British authorities on the case of TT and had been released on bail, while in July the proceedings for their extradition to Greece had began.
According to reports, the couple is held by the Greek police and on Thursday the two of them are expected to be brought to the Prosecutor which investigates the case.