Listing Rule 21

Henderson High Income Trust PLC
02 July 2004

HENDERSON HIGH INCOME TRUST PLC

HENDERSON GLOBAL INVESTORS

2 JULY 2004







                        HENDERSON HIGH INCOME TRUST PLC


                                Listing Rule 21




In accordance with paragraph 21.20 (l) (ii) of the Listing Rules, Henderson High
Income Trust plc announces its ten largest investments, including all
investments with a value greater than 5% of its gross assets, as at 30 June
2004:

Company
Gallaher
BP
HBOS
Aviva
HSBC
Shell Transport & Trading
Royal Bank of Scotland
National Grid
BT
Boots

This excludes group investments.




                                    - ENDS -



For further information, please call:


Alex Crooke

Henderson High Income Trust plc

Telephone: [phone]


Stephen Westwood

Head of Investment Trusts

Henderson Global Investors

Telephone: [phone]


Stephen Phillips

Associate Director

Henderson Global Investors

Telephone: [phone]


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