Labour MP Fiona Onasanya has been charged with perverting the course of justice over allegedly lying about who was behind the wheel of a speeding vehicle.
Mr Onasanya, of Cambridge, is jointly charged with his sister on the two counts she faces relating to incidents on 24 July 2017 and 23 August 2017. Both are due to appear at the Old Bailey on 13 August
The charges allege they intended to pervert the course of justice by driving a vehicle in excess of the speed limit, falsely informing the investigating authorities that a third party had been the driver and enabling them, as a consequence, to avoid such prosecution and punishment.
During the July incident, Ms Onasanya is alleged to have been driving - and during the August incident, her brother is alleged to have been driving.
The single count that Mr Onasanya faces relates to an incident on 17 June 2017.
The BBC contacted the office of Ms Onasanya and A Labour Party spokesman said: "It would not be appropriate to comment on an ongoing case."
Ms Onasanya, who was a solicitor before being elected to Parliament, is a Labour whip, meaning she is responsible for party discipline.