SDI Group plc

("SDI", the "Company", or the "Group")

Total Voting Rights

SDI Group plc, the AIM quoted group focused on the design and manufacture of scientific and technology products for use in digital imaging and sensing and control applications, announces that the total number of ordinary shares of 1 penny each ("Ordinary Shares") in issue is 99,558,164 and there are no Ordinary Shares in treasury. Therefore, the total number of Ordinary Shares with voting rights in the Company is 99,558,164.

The above figure of 99,558,164 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the FCA's Disclosure Guidance and Transparency Rules.

Enquiries

SDI Group plc                                                                                   01223 727144

Ken Ford, Chairman

Mike Creedon, CEO

Jon Abell, CFO

finnCap Ltd                                                                                        020 7220 0500

Ed Frisby/Kate Bannatyne/Milesh Hindocha - Corporate Finance

Andrew Burdis/Sunila de Silva - ECM

JW Communications                                                                     07818 430 877

Julia Wilson - Investor & Public Relations

About SDI Group plc:

SDI designs and manufactures scientific and technology products for use in digital imaging and sensing and control applications including life sciences, healthcare, astronomy, manufacturing, precision optics and art conservation. SDI operates through its company divisions: Atik Cameras, Synoptics, Graticules Optics, Sentek, Astles Control Systems, Applied Thermal Control, MPB Industries, Chell Instruments and Monmouth Scientific.

SDI continues to grow by developing its own technology advancements and by improving its global sales channels, as well as through pursuing strategic, complementary acquisitions. www.thesdigroup.net