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REG - Mast Energy Dvlpmts. - Hindlip Project Significant Construction Progress

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RNS Number : 3848C  Mast Energy Developments PLC  07 October 2025

Mast Energy Developments PLC

(Incorporated in England and Wales)

(Registration Number: 12886458)

LEI :213800HFVHGJ9YGO9F71

Share code on the LSE: MAST

ISIN: GB00BNG90H86

('MED' or 'the Company')

 

Dated: 7 October 2025

 

MAST Energy Developments PLC

("MAST" or "MED" or the "Company")

 

MAST's Hindlip 7.5 MW Flexible Generation Power Project Significant
Construction Progress

With Arrival of Rolls-Royce Engines

 

Application For Block Listing

 

London, UK - Mast Energy Developments PLC (LSE: MAST) is pleased to announce,
further to its RNS announcement dated 20 August 2025, significant progress on
its 7.5 MW Hindlip flexible generation power project, which is fully funded in
partnership with Powertree, the highlights and details of which are outlined
below.

 

Key Highlights:

·    Engineering, Construction, and Procurement ("EPC") progress at
Hindlip 7.5 MW flexible generation power project takes significant step
forward with arrival of the Rolls-Royce mtu low-carbon reciprocating gas
turbine engines, which is typically the longest order lead-time capex item and
the critical path to commercial operations date ("COD");

·    Rolls-Royce mtu 20V4000 GS low-carbon reciprocating gas turbine
engines secured through Yellow Power, a leading UK EPC company focused on
Rolls-Royce mtu power solutions;

·    See photos below of Hindlip's engines being assembled;

·    The Rolls-Royce mtu 20V4000 series offers world-class efficiency,
reliability, and lower emissions, making it one of the most competitive
engines for decentralised flexible power generation;

·    Stamford HV804X alternators paired with the engines deliver clean,
stable output with industry leading >96% efficiency and low harmonic
distortion, supporting electricity grid resilience; and

·    Site full construction works (including inter alia civils, LV and
HV electricals, and grid- and gas connection) progressing, keeping the project
on track to complete construction and reach COD in Q2 2026.

 

Technical Prowess of the Rolls-Royce mtu 20V4000 GS Engines:

·    20-cylinder V-configuration, lean-burn low-carbon reciprocating
natural gas turbine engine with turbocharging;

·    World class electrical efficiency ~42% with high total efficiency
when combined with heat recovery options;

·    Robust design proven across global power applications, with low
maintenance overheads;

·    Engines are certified for hydrogen and green-gas readiness, ensuring
long-term sustainability and use of engines; and

·    Excellent local operations and maintenance support via Yellow Power
and Rolls-Royce.

 

About Rolls-Royce mtu:

Rolls-Royce's Power Systems division, through its mtu brand, is a world
leading supplier of high-speed gas engines for power generation and marine
applications. The mtu Series 2000 and Series 4000 engine families have been
developed over more than two decades, with over 100,000 units delivered
worldwide. The business has established a strong position in clean, efficient
gas-based power, with engines offering low emissions performance in line with
stringent global standards. Recent advancements include hydrogen-ready
certification and compatibility with sustainable fuels, positioning the mtu
portfolio at the forefront of the energy transition. mtu gas engines are
deployed globally in stationary generation, combined heat and power, and
marine propulsion, with ongoing development in hybrid and hydrogen solutions
to support decarbonisation.

 

Ivan Wentzel, Head of Operations at MAST Energy, said: "We are delighted to
confirm the securing and assembly of Rolls-Royce mtu 20V4000 GS engines for
our Hindlip site in partnership with Powertree through Yellow Power, a trusted
supplier with deep expertise in Rolls-Royce mtu technology. These engines set
the benchmark for efficiency, reliability, and compliance in the flexible
generation sector. Hindlip is firmly on track for COD in Q2 2026 as planned,
further strengthening MED's portfolio of flexible generation assets and
contributing to the UK's energy security."

 

Photos:

1:         Rolls-Royce engine arrival at Yellow Power factory

 

 

 

2:         Cooling Skin Manufacturing and Assembly

 

 

 

3:         Rolls-Royce engine assembled and destined for Hindlip site

 

 

 

 

 

4:         Fully assembled Rolls-Royce engine and cooling skid destined
for Hindlip site

 

 

 

Stay up to date with MED's latest news and updates by joining our emailing
list and social media channels, as follows:

 

MED general enquiries - https://www.med.energy/contact
(https://www.med.energy/contact)

MED email alerts - https://www.med.energy/rnsannoucements-1
(https://www.med.energy/rnsannoucements-1)

MED LinkedIn page
- https://uk.linkedin.com/company/mast-energy-developments-plc
(https://uk.linkedin.com/company/mast-energy-developments-plc)

MED X (formerly Twitter) handle - @mastplc

 

About MAST Energy Developments PLC:

MAST Energy Developments PLC (LSE: MAST) is a UK-based developer, operator
and owner of flexible generation power assets. The Company has deep expertise
in infrastructure planning, grid access, gas access, and efficient power
supply. Its new AI power supply strategy is intended to position MAST as a
leading AI infrastructure platform on the London Stock Exchange (read
more here (https://www.med.energy/aidatacentrepowersupply) ).

 

Application for Block Listing

Capitalised terms used in this part of this announcement have the same meaning
as those given to them in the Company's RNS announcement dated 23 May 2025
unless otherwise defined.

 

The Company announces that it has made an application to the Financial Conduct
Authority ("FCA") and the London Stock Exchange for the block listing (the
"Block Listing") of a total of 245,200,000 ordinary shares at par value of
£0.001 each (the 'Ordinary Shares').

 

The Block Listing application relates to Ordinary Shares to be issued from
time to time pursuant to the exercise of Cash Warrants issued pursuant to the
Equity Fundraise announced on 11 July 2025.

 

When issued, these Ordinary Shares will be credited as fully paid and will
rank pari passu in all respects with the existing issued Ordinary Shares of
the Company. It is expected that admission will become effective for the
Ordinary Shares on 8 October 2025.

 

ENDS

 

This announcement contains inside information for the purposes of the UK
version of the Market Abuse Regulation (EU No. 596/2014) as it forms part of
United Kingdom domestic law by virtue of the European Union (Withdrawal) Act
2018 ('UK MAR'). Upon the publication of this announcement, this inside
information is now considered to be in the public domain.

 

 Pieter Krügel      info@med.energy (mailto:info@med.energy)  Mast Energy           CEO

                                                              Developments PLC
 Guy Wheatley, CFA  +44 (0)74 9398 9014                       Fortified Securities  Corporate Broker

 

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