Allergy Therapeutics plc Regulatory Update

08 June 2011 -- Allergy Therapeutics plc (AIM: “AGY” or the “Company”), the fully integrated specialty pharmaceutical company specializing in allergy vaccines, has, as expected, received from the Paul Ehrlich Institute (“PEI”), the complete report on its Marketing Authorization Application (“MAA”) for Grass MATA MPL (marketed as Pollinex® Quattro/ Complete). The Company submitted its MAA to PEI, the Regulatory Authority for biological products in Germany, on 3rd March 2009.

In line with the normal review process, PEI has raised a number of questions on the Company’s MAA submission; the report has not requested any additional clinical studies. The Company believes that all the questions can be addressed and will be working closely with the PEI to provide a complete response later this year. Pollinex® Quattro will continue to be sold as a named patient product in Germany until the MAA is approved.

Unlike the European Medicines Agency (“EMA”) and the Food and Drug Administration (“FDA”), national authorities such us the PEI are not obliged to follow a particular timetable for review if the MAA’s are submitted using the individual country route. Since the introduction of the Therapeutic Allergen Regulation in 2008, the PEI has been inundated with a large number of submissions resulting in longer than usual review time.

Following the German national approval, Europe-wide registration under the European Union Mutual Recognition Procedure (“MRP”) will commence. In the initial phase of MRP, the Company has elected to apply for authorisation in the markets with the greatest revenue potential for Grass MATA MPL.

As announced on 26 April 2011, the FDA has confirmed that the clinical hold on the Investigational New Drug applications (INDs) for the three MATA-MPL products will be lifted once the protocols have been agreed. The Company is now in the process of submitting protocols to the FDA.

For further information

Allergy Therapeutics

+44 (0) 1903 845 820

Manuel Llobet, Chief Executive Officer

Ian Postlethwaite, Finance Director

Tom Holdich, R&D Director

+44(0) 7771 663 619

www.allergytherapeutics.com

Nomura Code Securities

+44 (0) 207 776 1200

Juliet Thompson/ Clare Terlouw

Financial Dynamics

+44 (0) 207 831 3113

Ben Brewerton/ Susan Quigley

About Pollinex® Quattro/ Complete (MATA MPL)

Pollinex® Quattro is a four injection therapeutic vaccine which is being developed for the treatment of allergic conditions which offers same season relief in as little as three weeks after treatment. It is a family of specific standardised vaccines representing a potentially extensive franchise for Allergy Therapeutics and is a novel entrant in the multibillion dollar global allergy market. It is currently available in Europe on a named patient basis.

Mo Noonan

Senior Manager

Financial Dynamics

Holborn Gate, 26 Southampton Buildings

London, WC2A 1PB

D +44 (0)20 7269 7116

M +44 (0)7876 444 977

www.fd.com