The Undercover Policing Inquiry or Pitchford Inquiry is an independent public inquiry into undercover policing in England and Wales. It was announced by Theresa May, the United Kingdom Home Secretary on 12 March 2015, and is due to report back in 2023. It is chaired by Sir John Mitting, following the resignation due to ill-health of Lord Justice Pitchford. In March 2018 campaigners and their legal team walked out of a hearing of the inquiry, calling for Mitting to step down.