Trading Update

6 October 2011

Immunodiagnostic Systems Holdings plc

("IDS" or the "Company")

Trading update

Immunodiagnostic Systems Holdings plc ('IDS' or 'the Company'), a leading producer of diagnostic testing kits for the clinical and research markets, announces a trading update for the six month period to 30 September 2011, prior to the release of its half-yearly report on Monday, 28 November 2011.

Turnover from continuing operations for the period is 21% ahead of the comparative period for last year at £27.3 million (2010: £22.6 million).

The Company has made continued progress in placing IDS-iSYS systems into reagent rental accounts as well as outright unit sales. At the end of September we had sold or placed 322 IDS-iSYS systems since launch in February 2009. During H1 we sold or placed 81 systems compared to 66 systems in H1 2010, an increase of 23%.

Overall trading continues to grow and the Board remains confident that, as in previous years, H2 revenues will exceed both those of H1 and of the corresponding period last year due to both the enlarged estate of IDS-iSYS system placements and an expanded IDS-iSYS product menu.

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