Environment Agency issues permit for Iron Mountain LON3 Data Center

The Environment Agency has issued an environmental permit to Iron Mountain (UK) Data Center Limited for the LON3 Data Center in Slough.

• Permit issued: Environmental permit EPR/TP3120LE/A001 granted to Iron Mountain (UK) Data Center Limited for LON3 Data Center; decision and permit documents published on 15 January 2026 (Permit PDF: 463 KB, 21 pages; Decision document PDF: 213 KB, 17 pages).
• Regulatory context and access: Applies to England under the Industrial Emissions Directive (IED); documents available on GOV.UK and accessibility requests can be made via enquiries@environment-agency.gov.uk.