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REG - Mast Energy Dvlpmts. - Pyebridge FlexGen Power Asset Revenues Surge

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RNS Number : 1749D  Mast Energy Developments PLC  14 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: 14 October 2025

 

MAST Energy Developments PLC

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

 

MAST's 100% Owned Pyebridge 8.1 MW FlexGen Power Asset Revenues Surge

And Produces Record High Monthly Electricity Generation During September 2025

 

London, UK - Mast Energy Developments PLC (LSE: MAST) is pleased to announce,
further to its RNS announcement dated 31 July 2025, an update on its 100%
owned Pyebridge 8.1 MW flexible generation power asset that is in commercial
production, including details of revenues generated during the third quarter
of 2025 and year to date. Key highlights are outlined below.

 

Key Highlights:

·     Pyebridge generated and sold c. 2.5 Gigawatt/hours ('GWh') of
electricity during Q3 2025, representing a c. 24% increase compared with Q2
2025 and a c. 44% increase compared Q3 2024;

·     Notably, in September 2025, Pyebridge achieved a record monthly
electricity generation output of c. 1 GWh;

·     Increase in production due to successful completion of
refurbishment programme at Pyebridge as previously announced, and increase in
flexible generation power demand due to intermittent renewables;

·     Total revenues generated for the first 9-months of 2025 came to c.
£1.1 million, representing Pyebridge's highest income generated over the
first 9 months of any year, and a c. 300% increase compared to the same period
in the prior year;

·     Total revenues based on an average of c. 5.4 MW in production over
the period, representing c. £276,000 per MW per annum;

·     During the first 9-months of 2025 Pyebridge achieved an average
electricity sales price of c. £143/MWh representing a c. 72% outperformance
compared to the average wholesale market electricity price over the same
period; and

·     During the first 9-months of 2025 Pyebridge generated and sold
electricity for an average of 10 hours per day, which is clear evidence of the
critical need for flexible power generation and validates MAST's business
model.

 

What this means for MAST:

·    Validates business case: The strong results at Pyebridge are clear
evidence and align with MAST's projections of rapidly increasing demand for
flexible generation power, driven by intermittent renewables and the rapid
increase in AI datacentres; and

·    Investor confidence: The strong results at Pyebridge has established
a solid foundation and provides clear sight of what investors can expect from
every Megawatt that MAST adds to its portfolio as it continues to build toward
its 1 GW vision.

 

Tanya Zwemstra, Head of Finance at MAST Energy, said: "We are delighted to
report the increasingly positive trading results of Pyebridge, the Company's
100% owned flagship producing flexible generation power asset. The time and
capital investment into the refurbishment program are clearly yielding
results, with both operational and financial performance showing strong
momentum."

 

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) ).

 

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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