Allergy Therapeutics plc

("Allergy Therapeutics", "ATL" or the "Group")

Allergy Therapeutics proactively initiates a short-term pause in UK manufacturing to optimise quality systems and accelerate capacity improvements

04 October 2022 Allergy Therapeutics plc (AIM: AGY), the fully integrated commercial biotechnology company specialising in allergen immunotherapy, today announces that it has proactively paused production at the Freeman facility, part of its Worthing, UK manufacturing site, in order to accelerate ongoing site improvements. No areas for improvement are related to the safety of products and all of the Group's clinical trials remain unaffected.

The partial pause in production follows an internal review of current operating processes and is part of the Group's previously communicated ongoing programme to improve the robustness of its quality systems and build capacity across its manufacturing facilities.

Work is ongoing to minimise the commercial impact. We currently believe the pause in production will be confined to a number of weeks and we are working to limit the impact on revenue in that period.

Manuel Llobet, CEO at Allergy Therapeutics, stated: "This temporary pausing of production is a necessary step to ensure that we can both continue to deliver the highest standards of quality in our products and build capacity for the future growth of the Group. It does not affect the safety of our products. Our work to deliver ongoing improvements has identified a number of systems that require further optimisation. Accelerating this work will ensure Allergy Therapeutics is fit for the future across its growing portfolio.

"We continue to support our strong R&D driven pipeline. Our clinical trials remain on track and are completely unaffected by these manufacturing improvements."

This announcement contains inside information for the purposes of Article 7 of Regulatory (EU) No596/2014.

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For further information, please contact:

Allergy Therapeutics

+44 (0) 1903 845 820

Manuel Llobet, Chief Executive Officer

Nick Wykeman, Chief Financial Officer

Panmure Gordon (Nominated Adviser and Broker)

+44 (0) 20 7886 2500

Freddy Crossley, Emma Earl, Corporate Finance

Rupert Dearden, Corporate Broking

Consilium Strategic Communications

+44 20 3709 5700

Mary-Jane Elliott / David Daley / Davide Salvi

[email protected]

Stern Investor Relations, Inc.

+1 212 362 1200

Christina Tartaglia

[email protected]

Notes for editors:

About Allergy Therapeutics

Allergy Therapeutics is an international commercial biotechnology company focussed on the treatment and diagnosis of allergic disorders, including aluminium free immunotherapy vaccines that have the potential to cure disease. The Group sells proprietary and third-party products from its subsidiaries in nine major European countries and via distribution agreements in an additional ten countries. Its broad pipeline of products in clinical development includes vaccines for grass, tree and house dust mite, and peanut allergy vaccine in pre-clinical development. Adjuvant systems to boost performance of vaccines outside allergy are also in development.

Formed in 1999 out of Smith Kline Beecham, Allergy Therapeutics is headquartered in Worthing, UK with more than 11,000m² of state-of-the-art MHRA-approved manufacturing facilities and laboratories. The Group, which, employs c.600 employees and is listed on the London Stock Exchange (AIM:AGY). For more information, please see www.allergytherapeutics.com.