Rule 2.10 Announcement

7 September 2016

Source BioScience plc(or "the Company")

Rule 2.10 - Number of Relevant Securities in Issue

Pursuant to Rule 2.10 of the Code, Source BioScience confirms that there are 349,351,081 ordinary shares of 2 pence each in issue with International Securities Identification Number GB0009739649.

Enquiries

Source BioScience plc

Dr Nick Ash, Company Secretary

Tel: +44 (0) 115 973 9010

Email: [email protected]

www.sourcebioscience.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 Diagnostics, DNA Sequencing and Genomics, Analytical and Regulated Services, Clinical Products, Life Science Research Reagents and Controlled Environment for a comprehensive range of applications. These Laboratory 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.