Holding(s) in Company

 TR-1: Notification of Major Interests in Shares

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Xafinity PLC

2. Reason for the notification  (yes/no)

An acquisition or disposal of voting rights

Yes

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

No

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

No

An event changing the breakdown of voting rights

No

Other (please specify): ______________

No

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

Wellington Management Group LLP

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

BBH ISL NOMINEES LTD

BNY Mellon Nominees Limited

GOLDMAN SACHS INTERNATIONAL

JP Morgan Chase Nominees Limited

ROY Nominees Limited

State Street Nominees Limited

VIDACOS NOMINEES LIMITED

5. Date of transaction  (and date on which the threshold is crossed or reached if different):

21 March 2017

6. Date on which issuer notified:

22 March 2017

7. Threshold(s) that is/are crossed or reached:

5%

8. Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of voting rights

Number of shares

Number of voting rights

Percentage of voting rights

Direct

Indirect

Direct

Indirect

GB00BDDN1T20 Common Stock

7,054,103

7,054,103

5.15%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period

No. of voting rights that may be acquired (if the instrument is exercised/converted)

Percentage of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise Price

Expiration date

Exercise/ conversion period

No. of voting rights instrument refers to

Percentage of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

7,054,103

5.15%

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

Wellington Management International Ltd is an investment management entity that manages the assets of certain funds and/or managed accounts and the assets under its management include:

258,370 of interests described in Box 8A of this notification

Wellington Management International Ltd is a direct controlled undertaking of Wellington Management Global Holdings, Ltd. , which, in turn, is a direct controlled undertaking of Wellington Investment Advisors Holdings LLP , which, in turn, is a direct controlled undertaking of Wellington Group Holdings LLP , which, in turn, is a direct controlled undertaking of Wellington Management Group LLP .

Wellington Management Company LLP is an investment management entity that manages the assets of certain funds and/or managed accounts and the assets under its management include:

6,795,733 of interests described in Box 8A of this notification

Wellington Management Company LLP is a direct controlled undertaking of Wellington Investment Advisors Holdings LLP , which, in turn, is a direct controlled undertaking of Wellington Group Holdings LLP , which, in turn, is a direct controlled undertaking of Wellington Management Group LLP .

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

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

13. Additional information:

14. Contact name:

Mark O'Brien

15. Contact telephone number:

44-20-7126-6310