The Foreign Secretary William Hague given a written statement on the investigation into Nick Heywood's death.
He told MPs that the Chinese investigation into Mr Heywood's death was launched after repeated requests from the UK.
He also said:
"I welcome the fact that the Chinese authorities have now committed themselves to undertake the investigation into Mr Heywood's death that we sought.
"We now wish to see the conclusion of a full investigation that observes due process, is free from political interference, exposes the truth behind this tragic case, and ensures that justice is done.
China's ruling Communist Party has said that it is committed to probing a political scandal, surrounding the death of Neil Heywood.
The death of British businessman Neil Heywood has fuelled a frenzied rumour mill. Time to separate fact from fiction.
The Prime Minister is expected to address the sensitive issue of the death of Neil Heywood with the man known as China's propaganda chief.