16 June 2025

HELICAL PLC

("Helical" or the "Company")

Annual Report and Accounts and Notice of Annual General Meeting

Following the release on 21 May 2025 of the Company's Annual Results for the year ended 31 March 2025 ("2025 Results Announcement"), the Company announces that it has published its Annual Report and Accounts for the year ended 31 March 2025 ("2025 Annual Report").

The Company also announces that its 2025 Annual General Meeting ("2025 AGM") will be held at 9:00 a.m. on Thursday 17 July 2025 at the Company's registered office located at 22 Ganton Street, London W1F 7FD.

Copies of the 2025 Annual Report and Notice of the 2025 AGM are available to view on the Company's website at www.helical.co.uk. Pursuant to UK Listing Rule 6.4.1, copies of these documents have also been submitted to the National Storage Mechanism and will shortly be available for inspection at:  https://data.fca.org.uk.

The 2025 Results Announcement, together with the information in the Appendix (which has been extracted from the 2025 Annual Report), contains the information required to comply with Disclosure Guidance and Transparency Rule 6.3.5, including principal risk factors, details of related party transactions and the Directors' Responsibilities Statement. This announcement is not a substitute for reading the 2025 Annual Report in full.

Appendix

Directors' Responsibility Statement under the Disclosure and Transparency Rules

Each of the Directors, whose names and functions are listed on pages 99 to 101 of the 2025 Annual Report, confirm that, to the best of their knowledge:

• the financial statements, prepared in accordance with the applicable set of accounting standards, give a true and fair view of the assets, liabilities, financial position and profit or loss of the Company and the undertakings included in the consolidation taken as a whole;
• the Strategic Report contained in the Annual Report includes a fair review of the development and performance of the business and the position of the company and the undertakings included in the consolidation taken as a whole, together with a description of the principal risks and uncertainties that they face; and
• the Directors consider the Annual Report and Accounts, taken as a whole, is fair, balanced and understandable and provides the information necessary for shareholders to assess the Group's and the Company's position, performance, business model and strategy.

This responsibility statement was approved by the Board of Directors on 20 May 2025 and was signed on its behalf by:

Chief Executive Officer   Chief Financial Officer

Matthew Bonning-Snook   Tim Murphy

20 May 2025           20 May 2025