Conservative former disabilities minister Justin Tomlinson faces being suspended from the House of Commons for two days and ordered to make a statement to MPs for leaking a parliamentary report.
The North Swindon MP shared the draft findings of an inquiry into Regulating Consumer Credit with an employee of payday lender Wonga.
An inquiry by the Commons sleaze watchdog found he "committed a contempt" in disclosing the report and that his actions "constituted substantial interference" with the Public Accounts Committee.