The following graphs show the numbers of notices of appointment published in the Gazette on a weekly basis. Therefore, they likely lag a week or so behind the actual dates of appointment. The vertical line shows the date that the UK went into the first lockdown. The graphs are updated each week.
The Insolvency Service is also publishing monthly figures based on Companies House filings on the 15th day of each month. These are available at www.gov.uk/government/collections/monthly-insolvency-statistics