Holding(s) in Company

Henderson Opportunities Trust PLC
05 November 2007



TR-1:               notification of major interests in shares

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

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

An acquisition or disposal of voting rights

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): System failings missed threshold cross to 8%                              X

3. Full name of person(s) subject to the notification               Henderson Global Investors Ltd
obligation:

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

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

6. Date on which issuer notified:                                            5th November

7. Threshold(s) that is/are crossed or reached:                                    8%

8. Notified details:




A: Voting rights attached to shares
Class/type of    Situation previous to Resulting situation after the triggering transaction
shares           the Triggering
                 transaction
 if possible     Number of  Number of  Number of     Number of voting rights  % of voting rights
using the ISIN   Shares     Voting     shares
CODE                        Rights     Direct        Direct       Indirect    Direct       Indirect

GBP0.25                                731,753       731,753                  8.915%


B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial    Expiration date Exercise/ Conversion      Number of voting rights    % of voting
instrument                           Period/ Date              that may be acquired if    rights
                                                               the instrument is
                                                               exercised/ converted.



Total (A+B)
Number of voting rights                            % of voting rights

731,753                                            8.915%





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



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:                                 Gavin Dolding

15. Contact telephone number:                     020 7818 5217


Annex Notification Of Major Interests In Shares

A: Identity of the person or legal entity subject to the notification obligation

Full name (including legal form for legal entities)

Contact address (registered office for legal entities)

Phone number

Other useful information (at least legal representative
for legal persons)



B:        Identity of the notifier, if applicable

Full name

Contact address

Phone number

Other useful information (e.g. functional relationship
with the person or legal entity subject to the
notification obligation)


C:        Additional information




                      This information is provided by RNS
            The company news service from the London Stock Exchange