David Cameron has delayed publication of a report into the behaviour of Aidan Burley, the Cannock Chase MP who attended a Nazi-themed stag party in France.
An inquiry ordered by the Conservative leader has now produced its findings - but the party is refusing to release them because French authorities have launched a criminal investigation into the affair.
It says it cannot comment until the inquiries in France have been completed. French authorities have given no indication of how long this might take.
Mr Cameron launched the inquiry after Mr Burley (Con), aged 33, was pictured on a Nazi-themed stag party in the Alpine ski resort of Val Thorens with a groom dressed in an SS uniform.
Guests at the bash chanted the dictator’s name, while one taunted a waiter for being French, and another toasted the ‘Third Reich’.
The Staffordshire MP issued an apology, but it was then reported that he had been responsible for hiring the costume worn by the groom.
Mr Cameron responded by sacking him as a Ministerial aide to Transport Secretary Justine Greening, and ordering the investigation.
The Conservative Party said the inquiry would report back by the end of February. But earlier this month, French authorities announced they were launching a formal investigation.
It is a crime in France to wear, or exhibit in public, anything reminiscent of what was worn or used by the Nazis, unless taking part in a film, play or historical exhibition.
As a result, the report’s findings have been delayed.
A Conservative spokesman said: “Senior party officials have completed an investigation into Aidan Burley’s presence at a stag party at which the groom wore an imitation Nazi uniform.
“It would be inappropriate to release the report’s findings while French police are conducting their own investigation. Publication has therefore been postponed until the inquiries in France are over.”
Sources would not confirm whether Mr Cameron had personally seen the report.