Portfolio Update

Henderson High Income Trust PLC
04 April 2006


HENDERSON HIGH INCOME TRUST PLC


HENDERSON GLOBAL INVESTORS


4 APRIL 2006



                        HENDERSON HIGH INCOME TRUST PLC

                            Listing Rule 15.4.11 (2)


In accordance with paragraph 15.4.11 (2) of the Listing Rules, Henderson High
Income Trust plc announces its ten largest investments as at 31 March 2006.
There are no holdings with a value greater than 5% of gross assets.


Company

HSBC
BP
Old Mutual
BT
Royal Dutch Shell
Lloyds TSB
Prodesse Investment
British American Tobacco
HBoS
Galliford


This excludes group investments.


                                    - ENDS -

For further information, please call:



Alex Crooke

Henderson High Income Trust plc

Telephone: [phone]



James de Sausmarez

Head of Investment Trusts

Henderson Global Investors

Telephone: [phone]


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