The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the UK version of the EU Market Abuse Regulation (2014/596) which is part of UK law by virtue of the European Union (Withdrawal) Act 2018, ("MAR"), and is disclosed in accordance with the Company's obligations under Article 17 of MAR. Upon the publication of this announcement via a Regulatory Information Service, this inside information will be considered to be in the public domain.

30 April 2026

Chesterfield Special Cylinders Holdings plc

("CSC" or the "Company")

FY26 Trading Update & Notice of Interim Results

Chesterfield Special Cylinders Holdings plc (AIM: CSC) will release its FY26 interim results for the six-month period ended 28 March 2026 on Wednesday 20 May 2026.

Trading in the first half of the year was broadly in line with management expectations, and the Company expects to report a first-half revenue of £6.4 million (2025: £5.4 million) and an adjusted EBITDA^* loss of £0.8 million after central costs (2025: loss £1.3 million).

In the first half, the Company strengthened its overseas defence order book and secured its first order for Integrity Management services on overseas naval submarines. However, some UK naval Integrity Management deployments originally expected in FY26 have been postponed into FY27 due to delayed fleet docking schedules.

The Company remains frustrated by continued delays to the roll out of UK Hydrogen Allocation Round (HAR) projects and any related contract wins will now come too late to benefit FY26 results.

Overall, the Company now anticipates a full-year revenue and adjusted EBITDA performance at similar levels to the previous year (2025: revenue of £16.6 million, adjusted EBITDA of £0.8 million), slightly behind market expectations (adjusted EBITDA of £1.0 million).

* Adjusted EBITDA is earnings / loss before interest, tax, depreciation, amortisation and other exceptional costs

Additional information:

The person responsible for arranging release of this announcement on behalf of the Company is Chris Walters, Chief Executive.

For further information, please contact:

COMPANY DESCRIPTION

www.csc-holdings.com and www.chesterfieldcylinders.com

Chesterfield Special Cylinders is a world-leading designer and manufacturer of high-pressure gas storage and transportation systems, used principally in safety-critical defence and hydrogen energy applications, and provides inspection, testing and recertification services throughout the system lifecycle.