Her Majesty’s Revenue and Customs (HMRC) published statistics about the Coronavirus Job Retention Scheme on 18 September 2020 which include figures for jobs furloughed for the UK and by country and region as at 31 July. These are the latest figures available, and can be found on GOV.UK:
Information on the number of employees furloughed (rather than employments furloughed) is not available; a person may have multiple employments.
The next release of these statistics will provide data on employments furloughed for the UK and each country and region as at 31 August. This is due to be published on 22 October. More information on this release can be found here: https://www.gov.uk/government/statistics/announcements/coronavirus-job-retention-scheme-statistics-october-2020