AVO.L Regulatory News (AVO)

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

Advanced Oncotherapy plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights :

Other (please specify):

CHANGE TO THE NUMBER OF VOTING RIGHTS IN ISSUE

√

3. Full name of person(s) subject to thenotification obligation: iii

Aviva plc & its subsidiaries

4. Full name of shareholder(s)  (if different from 3.):iv

Registered Holder:

Available on Request 7,068*

Chase (GA Group) Nominees Limited 1,950,852*

HSBC Global Custody Nominee (UK) Limited 328,573*

*denotes direct interest

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

19 May 2017

6. Date on which issuer notified:

22 May 2017

7. Threshold(s) that is/are crossed orreached: vi, vii

3% to

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

Ordinary Shares GBP 0.25GB00BD6SX109

2,296,493 *

2,296,493 *

2,286,493

2,286,493

** Not disclosable

2.98%

** Not disclosable

* Includes Right to Recall Loaned Shares (10,000)

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

RIGHT TO RECALL LOANED SHARES

N/A

N/A

10,000*

*Direct Interest

0.01%

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

2,296,493

2.99%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

The voting rights are managed and controlled by Aviva Investors Global Services Limited and Friends Provident International Limited, with the following chain of controlled undertakings:-

Aviva Investors Global Services Limited:

· Aviva plc (Parent Company)

· Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)

· Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva Group Holdings Limited)

· Aviva Investors Global Services Limited (wholly owned subsidiary of Aviva Investors Holdings Limited)

Friends Provident International Limited:

· Aviva plc (Parent Company)

· Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)

· Friends Provident International Limited (wholly owned subsidiary of Aviva Group Holdings Limited)

Proxy Voting:

10. Name of the proxy holder:

See Section 4

11. Number of voting rights proxy holder will ceaseto hold:

12. Date on which proxy holder will cease to holdvoting rights:

13. Additional information:

Figures are based on a total number of voting rights of 76,609,194 as per the Company's 'Conversion of Convertible Loan Notes' announcement of

16 May 2017.

** Although not reportable, as per DTR5.1.5,the non-disclosable (indirect) position is currently 865,438 shares, and is included here in the interests of transparency.

14. Contact name:

Neil Whittaker, Aviva plc

15. Contact telephone number:

01603 684420