Director/PDMR Shareholding

14 October 2015

Source BioScience plc

(the 'Company')

Director/PDMR Shareholding

Source BioScience plc (LSE:SBS) announces that on 12 October 2015 Laurence Turnbull, Chairman of the Company, sold 2,000,000 ordinary shares of 2 pence each in the Company ("Ordinary Shares") in the market, at a price of 17 pence per Ordinary Share.

Following this transaction, Mr Turnbull has an interest in 2,750,000 Ordinary Shares representing approximately 0.79% of the Company's issued share capital.

This notification is provided in accordance with DTR3.1.4R(1).

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For further information, please contact:

Source BioScience plc

Dr Nick Ash, CEO and Company Secretary

Tel: +44 (0)115 973 9010

Email: [email protected]

www.sourcebioscience.com

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

Aubrey Powell/James White

Tel: +44 (0)207 496 3000

www.n1singer.com

About Source BioScience

Source BioScience plc (LSE: SBS) is a trusted provider of state of the art laboratory services and products to the healthcare and clinical, life and applied sciences and biopharma industries. It is an international business operating ten state of the art facilities in five countries and with customers in over 90 countries worldwide. The Group offers a complementary portfolio of laboratory services and products that share common technologies, laboratory processes, infrastructure and expertise. These include clinical diagnostics, genomics, proteomics, drug discovery and development research as well as controlled environment storage and testing services for a diverse range of markets. These services and products are provided to a large and diverse customer base including the top 50 pharmaceutical companies, leading universities and research institutes worldwide, the UK NHS and other healthcare providers. The Group is listed on the Premium Main Market of the London Stock Exchange.