30 June 2023

ADVANCED ONCOTHERAPY PLC

("Advanced Oncotherapy" or the "Company")

Total Voting Rights

Advanced Oncotherapy (AIM:AVO), the developer of LIGHT, the next-generation proton therapy system for cancer treatment, announces that the Company's issued share capital as at the date of this announcement comprises 542,573,869 ordinary shares of 25 pence each, with one voting right per share ("Ordinary Shares"). The Company does not hold any ordinary shares in treasury and therefore the total number of Ordinary Shares with voting rights in the Company is 542,573,869. This announcement is required to be made at month end in accordance with the FCA's Disclosure Guidance and Transparency Rules.

Rule 2.9 disclosure

In accordance with Rule 2.9 of the Takeover Code, AVO confirms that, at the close of business on 29 June 2023 its issued share capital consisted of 542,573,869 ordinary shares of 25 pence each. The International Securities Identification Number for the Company's ordinary shares is GB00BD6SX109.

About Advanced Oncotherapy Plc www.avoplc.com

Advanced Oncotherapy, a UK headquartered company with offices in London, Geneva, The Netherlands and in the USA, is a provider of particle therapy with protons that harnesses the best in modern technology. Advanced Oncotherapy's team "ADAM," based in Geneva, focuses on the development of a proprietary proton accelerator called, Linac Image Guided Hadron Technology (LIGHT). LIGHT's compact configuration delivers proton beams in a way that facilitates greater precision and electronic control.

Advanced Oncotherapy will offer healthcare providers affordable systems that will enable them to treat cancer with innovative technology as well as expected lower treatment-related side effects.

Advanced Oncotherapy continually monitors the market for any emerging improvements in delivering proton therapy and actively seeks working relationships with providers of these innovative technologies. Through these relationships, the Company will remain the prime provider of an innovative and cost-effective system for particle therapy with protons.