The Daily Star alleges the contestant is an ex-detective constable "who played a key role" on the Jimmy Savile abuse inquiry.
We are aware of reports concerning the proposed media appearance of a former detective constable.We have been in contact with Channel 5 and made them fully aware of potential risks and their responsibility to live investigations.
All officers joining the MPS and leaving the MPS are required to sign the Official Secrets Act.
More top news
An earthquake has hit the Italian resort island of Ischia, killing at least one person and trapping around six others.
Rain in the north tonight, cloudy and humid in the south
Britain is to set out proposals to ensure that cross-border legal disputes are dealt with in a "fair and sensible way" after Brexit.