The Judicial Conduct Investigations Office (JCIO) publishes statements, on behalf of the Lord Chancellor and the Lord Chief Justice, about judicial disciplinary cases which have resulted in a sanction on its website at: https://judicialconduct.judiciary.gov.uk/disciplinary-statements/2020/
Additionally, for 2013/14-2018/19, data about judicial office holders subject to disciplinary sanction is available in the JCIO’s annual reports at: https://judicialconduct.judiciary.gov.uk/reports-publications/
The annual reports of the JCIO and its predecessor, the Office for Judicial Complaints, covering the years 2006/7-2018/19 are available in the Library of the House. Data on disciplinary action in the reports is broken down by the following types of judicial office holders - the courts judiciary, tribunals judiciary, coroners and magistrates, and sanctions imposed.
The publicly available information does not break the data down by office (Lay Magistrates, Deputy District Judges etc), but the action needed to obtain this information would give rise to a disproportionate cost.