Hindlip breaks ground and update on 7 MW purchase

(Registration Number: 12886458)

Share code on the LSE: MAST

Dated: 6 November 2025

Quantum Data Energy PLC

("Quantum", "QDE" or the "Company")

Quantum's Hindlip 7.5 MW FlexGen Power Project Breaks Ground

and

Progress Update on Acquisition of 7 MW Brownfield FlexGen Site

London, UK - Quantum Data Energy PLC (LSE: MAST) is pleased to announce, further to its previous RNS announcement dated 7 October 2025 that its 7.5 MW Hindlip flexible generation power project ("Hindlip") that is fully funded in partnership with Powertee, has officially broken ground on-site marking a key milestone in the site's construction progress and keeping to the planned timeline to completion of construction and commercial operation and income production.

Further, Quantum is pleased to announce a progress update regarding its acquisition of a 7 MW flexible generation brownfield site as previously announced on 4 September 2025.

Hindlip Construction Progress Key Highlights:

Quantum is pleased to confirm that on-site mobilisation and civil works recently commenced, marking a significant milestone in the delivery of the Hindlip project.

Key activities and next steps are as follows:

• Site clearance and preparation commenced is expected to continue until mid-November 2025;
• Retaining walls to be installed by week ending 9 November 2025;
• Concrete foundation works for the engines, gas metering skid, transformers, control room, and HV switch room are scheduled to start imminently and be completed by approximately 8 December 2025;
• Permanent site fencing will be installed from mid-November 2025; and
• Major equipment deliveries and installations, including the Rolls-Royce mtu engines and balance of plant, are expected to commence in early 2026.

These developments reinforce that Hindlip remains firmly on track to achieve commercial operations (COD) in Q2 2026, as previously announced.

Progress photos from the Hindlip site showing the start of civil works are included below:

• Site clearance and soil removal starts
• Ground preparation for foundations
• Quantum's Head of Operations meeting with civil contractor on site
• General view of construction mobilisation at Hindlip site
• Foundations for retaining walls

Progress Update on Acquisition of 7 MW Brownfield FlexGen Site:

Quantum is pleased to report substantial progress towards the completion of the acquisition of the 7 MW 11kV flexible generation power brownfield site located in England (the "FlexGen Site").

Since the initial announcement, Quantum has achieved the following milestones:

• Offer to purchase the site as previously announced has been officially accepted by the seller;
• Technical due diligence has been successfully completed;
• Full Engineering, Procurement, and Construction ('EPC') scope of work assessment has been completed in consultation with Yellow Power; and
• Legal due diligence and commercial negotiation of the Sale and Purchase Agreement ('SPA') are well advanced and nearing finalisation.

The Company expects to complete the transaction within Q4 2025, subject to DD and contract, consistent with the timeline previously communicated.

Ivan Wentzel, Head of Operations at Quantum Data Energy PLC, said: "We are delighted with the solid progress across both our Hindlip new-build project and the 7 MW FlexGen Site acquisition. The Hindlip project's progress into the civil construction phase represents another important step toward our COD target in Q2 2026. At the same time, the FlexGen Site acquisition continues to advance in line with expectations, strengthening Quantum's near-term portfolio growth trajectory."

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