French prosecutor Eric Maillaud, in charge of the investigation into the al-Hilli family shootings told the press that "there were no problems" between UK and French jurisdictions during his visit to the UK today.
Mr Maillaud said the visit would help "reinforce cooperation and understanding" and would help to find a resolution to the investigation.
Brett Martin, the first witness who found the British family in the Alps has described the moment he came across the attack.
A friend of the al-Hilli family has said he believes he could assist the investigation into the fatal shootings of the three family members.
A previously unreported witness has told a French paper how he came across the aftermath of the killings of the al-Hilli family in the Alps.