Off-Site Emergency Plan

• Date released: 27 July 2026
• Request number: FOI202606019
• Release of information under: FOIA

Information requested

Correspondence addressed to Nigel Lynn, Chief Executive Officer, West Berkshire Council dated 29 November 2023, ONR reference: 2023/61771, Unique Number: ONR-TD-EPR-23-034, subject: Off-Site Emergency Plan for AWE Nuclear Licensed Sites references exercises associated with the ALDEX-23 programme whilst highlighting outstanding actions from previous tests and exercises, including modular tests which concluded in 2022 as part of ALDEX-19. In summary the correspondence highlights the pressures placed upon the OSEP (Off-site Emergency Plan) as a consequence of the IAEA's issued guidance to countries, including the United Kingdom, following the Great East Japan (Tohoku) Earthquake during March 2011.

1. In relation to the above 2023 letter, please provide details of subsequent correspondence between the ONR and West Berkshire Council Senior Management (ie CEO / Heads of Department).
2. Please provide a summary list of ALDEX and other associated types of exercises conducted since 2019 relative to the AWE sites located within the local authority jurisdiction known as West Berkshire.

Our response

We confirm that under s.1 of the FOIA, we hold the information you have requested.

For Point 1, please find attached related correspondence.

Please note that information relating to individuals has been redacted from the enclosed documents as it constitutes personal data. The release of this type of information could identify an individual either directly or indirectly, and as such, any personal data that could identify another individual has been withheld under the remit of exemption s.40(2) of the FOIA.

For Point 2, in response to your request for information related to exercises since 2019, such as ALDEX, please find information related to this in Table 1.

Table 1: Summary list of ALDEX and other associated types of exercises conducted since 2019 relative to the AWE sites located within the local authority jurisdiction known as West Berkshire

Exemptions applied

S.40(2)

Public Interest Test (PIT)

N/A