How many historic files have been lost, (or disappeared) while on loan to government departments, please supply the data in a time series?
I can confirm that The National Archives holds information relevant to your request. The information you have requested is already available in the public domain and is therefore exempt under section 21 of the FOI Act. Section 21 does not oblige a public authority to provide information if it is already reasonably accessible by other means. In this case, the exemption applies because the information is published on our website here:
The spreadsheet includes the date the items went missing which will allow you to convert them into a ‘time series’.
Further guidance on section 21 can be found on the ICO website here: