Office for Nuclear Regulation

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Consent to a tenancy at will to National Nuclear Laboratories for B22 and B34

Licence Instrument No. 522

Permission requested

Sellafield Limited wishes to grant a tenancy at will for B22 and B34 to National Nuclear Laboratories Limited (NNL).


HSE has specific powers under the nuclear site licence conditions for the control of licensees activities. The following information relates to where the licensee must not let, convey, assign or transfer any part of their site to a third party without obtaining HSE's consent.

The licensee at Sellafield wish for a tenancy at will of Buildings 22 and 34 to NNL on the Windscale site, subject to a lease being negotiated to continue NNLs occupation of these buildings in support of their activities in B13.

In accordance with Sellafield Limited's arrangements made under Licence Condition 3, Sellafield Limited has made a submission to HSE's Nuclear Directorate (ND) requesting the consent of the HSE.

Work carried out by ND in consideration of this request

ND has developed procedures for processing of Licence Condition 3 lease applications. This submission has now completed all of the processes within the procedures.

Various queries have been discussed and resolved with the Sellafield Limited Property Management team.

HSE's solicitors have considered the submission documentation, and have advised that there are no outstanding legal issues and that the Health and Safety Executive is content to consent to the lease.

Matters that arose from NDs work and outcome of NDs consideration

Various queries relating to the submitted documentation have been raised by the ND leasing Applications Team and HSE's solicitors. These queries have now been adequately addressed by Sellafield Limited.


HSE has no outstanding issues or concerns relating to Sellafield Limited's request which would preclude the granting of a Consent.


HSE issues Licence Instrument No. 522 (Nuclear Site Licence 83) to Sellafield Limited Windscale. This consents to the licensee granting a Tenancy at Will for B22 and B34 to NNL on the Windscale site.