Portfolio Update

Henderson High Income Trust PLC
04 July 2006



HENDERSON HIGH INCOME TRUST PLC


HENDERSON GLOBAL INVESTORS



4 JULY 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 30 June 2006. There
are no holdings with a value greater than 5% of gross assets.


Company
HSBC
BT
BP
Royal Dutch Shell
Lloyds TSB
Old Mutual
British American Tobacco
Scottish & Southern Energy
Prodesse Investment
Galliford Try



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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