Total Voting Rights

30 August 2013

Source BioScience plc

(the 'Company')

Shares in Issue

In accordance with the FCA's Disclosure and Transparency Rules, Source BioScience plc (LSE: SBS) confirms that as at 30 August 2013 the Company has 212,873,965 ordinary shares of 2 pence each in issue.

The figure of 212,873,965 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 change to their interest in, Source BioScience plc under the Disclosure and Transparency Rules. The voting rights of all ordinary shares in the Company rank pari passu and the Company does not hold any ordinary shares in treasury.

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Source BioScience plc

Dr Nick Ash, CEO

Tel: +44 (0) 115 973 9010

Email: [email protected]

www.sourcebioscience.com

For investor and media enquiries:

N+1 Singer (Financial Advisor, Sponsor and Broker)

Aubrey Powell/ Joseph Stroud/ Laura White

Tel: +44 (0)20 7496 3000

www.n1singer.com

College Hill (PR Agency to Source BioScience)

Melanie Toyne-Sewell/Claire Dickinson

Tel: +44 (0)20 7457 2020

Email: [email protected]

About Source BioScience:

Source BioScience plc (LSE: SBS) is an international diagnostics and genetic analysis services business serving the healthcare and research markets. The Healthcare division provides screening and reference laboratory diagnostic testing for cancer and other diseases in addition to complementary products for serology and diagnostic applications. The LifeSciences division provides core laboratory research support from conceptualisation to implementation, calling upon a wide range of cutting-edge technology platforms including an online catalogue of biomolecular tools. The Group is a trusted provider of a complete range of sophisticated microarray, next generation and conventional sequencing services. GLP, GCP and CPA accreditations make the sequencing offerings also very attractive for applications in regulatory studies or clinical settings. The Group has its headquarters in Nottingham, UK and additional information about the Source BioScience Group, and its activities, can be found at www.sourcebioscience.com