Holding(s) in Company

For filings with the FSA include the annex

For filings with issuer exclude the annex 

TR-1: Notifications of Major Interests in Shares

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

DEVELOPMENT SECURITIES PLC

2. Reason for notification (yes/no)

An acquisition or disposal of voting rights

X

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

An event changing the breakdown of voting rights

Other (please specify):______________

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

BT PENSION SCHEME TRUSTEES LIMITED AS TRUSTEE OF THE BT PENSION SCHEME. SEE SECTION 9 FOR FURTHER INFORMATION

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

N/A

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

5 MAY 2009

6. Date on which issuer notified:

6 MAY 2009

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

2%

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

0266846 ORD 50P

1,236,269

1,236,269

0

0

1,209,612

0%

2.979%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

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

Percentage of voting rights

Total (A+B)

Number of voting rights

Percentage of voting rights

1,209,612

2.979%

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

BT PENSION SCHEME TRUSTEES LIMITED IS THE PARENT UNDETAKING OF BRITEL FUND TRUSTEES LIMITED, WHICH IS THE PARENT UNDERTAKING OF HERMES FUND MANAGERS LIMITED. HERMES FUND MANAGERS LIMITED IS THE PARENT UNDERTAKING OF: 1. HERMES EQUITY OWNERSHIP SERVICES LIMITED (VOTING RIGHTS HELD IN THIS ISSUER: 0.781%) 2. [HERMES INVESTMENT MANAGEMENT LIMITED (VOTING RIGHTS HELD IN THIS ISSUER: 2.198%)] PLEASE SEE SECTION 13 FOR FURTHER INFORMATION

Proxy Voting:

10. Name of proxy holder:

SEE COMMENT IN SECTION 13.

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

SEE COMMENT IN SECTION 13.

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

SEE COMMENT IN SECTION 13.

13. Additional information:

HERMES EQUITY OWNERSHIP SERVICES LIMITED HOLD THE VOTING RIGHTS UNDER A STANDING PROXY CONTAINED IN AGREEMENTS FOR THE PROVISION OF VOTING SERVICES TO VARIOUS UNDERYING CLIENTS FOR THE PURPOSES OF DTR 5.2.1(H), WHICH INCLUDES ALL THE SHARES OWNED DIRECTLY BY BT PENSION SCHEME. HERMES INVESTMENT MANAGEMENT LIMITED HOLD THE VOTING RIGHTS UNDER A STANDING PROXY CONTAINED IN INVESTMENT MANAGEMENT AGREEMENTS WITH VARIOUS UNDERYING CLIENTS FOR THE PURPOSES OF DTR 5.2.1(H). ALL VOTING RIGHTS HELD ON BEHALF OF THE ABOVE ENTITIES ARE AGGREGATED FOR THE PURPOSES OF DTR 5.2.1(E) THIS DISCLOSURE IS MADE BY BT PENSION SCHEME TRUSTEES LIMITED, WHICH IS THE ULTIMATE PARENT UNDERTAKING FOR THE PURPOSES OF DTR 5.2.1(E).

14 Contact name:

VALERIE DAVIDSON/MARGARET MOSS

15. Contact telephone number:

020 7680 2177/020 7680 2125