Boris Johnson may be only witness called in Partygate investigation

Privileges committee rebuffs lawyer's request to give evidence alongside former prime minister

Boris Johnson may be the only witness called by the privileges committee for its investigation into whether he misled parliament over Partygate, as the inquiry has rebuffed his lawyer's request to give evidence alongside him.

The former prime minister is preparing to appear at a televised hearing on Wednesday. The length of the grilling will depend on how much he says.