Director/PDMR Shareholding

Synairgen plc
16 November 2005

Synairgen plc ('Synairgen' or the 'Company')

Director Shareholdings

The Company was informed on 15 November 2005 that Richard Marsden, Managing
Director of Synairgen, had been granted options on 15 November 2005 over 43,829
ordinary shares of 1 pence each ('Ordinary Shares') in the Company under the
Company's Long-Term Incentive Plan (the 'LTIP') at an exercise price of 1 pence.

Mr Marsden's holding in options over Ordinary Shares has therefore increased to
743,829, representing approximately 3.43 per cent. of the issued ordinary share
capital of the Company.

The Company was informed on 15 November 2005 that John Ward, Finance Director of
Synairgen, had been granted options on 15 November 2005 over 105,191 Ordinary
Shares in the Company under the Company's LTIP at an exercise price of 1 pence.

Mr Ward's holding in options over Ordinary Shares has therefore increased to
385,191, representing approximately 1.78 per cent. of the issued ordinary share
capital of the Company.






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