Director/PDMR Shareholding

Synairgen plc
28 June 2007


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

                            Directors' Shareholdings


The Company was informed on 27 June 2007 that Simon Shaw, Non-executive Chairman
of Synairgen, acquired 40,000 ordinary shares of 1p each in the Company ('
Ordinary Shares') at a price of 61 pence per share on 26 June 2007. As a
consequence of this transaction, his holding in the Company equates to 55,400
Ordinary Shares, which represents approximately 0.3 per cent. of the issued
ordinary share capital of the Company. Taking account of his 700,000 Founder
Options (exercisable at nominal value) his total interest represents
approximately 3.5 per cent. of the issued share capital.

The Company was informed on 28 June 2007 that John Ward, Finance Director of
Synairgen, acquired 15,000 Ordinary Shares in the Company at a price of 60.75
pence per share on 28 June 2007. As a consequence of this transaction, his
holding in the Company equates to 22,692 Ordinary Shares, which represents
approximately 0.1 per cent. of the issued ordinary share capital of the Company.



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