Listing Rule 21

Henderson High Income Trust PLC
04 April 2005

HENDERSON HIGH INCOME TRUST PLC



HENDERSON GLOBAL INVESTORS



4 APRIL 2005



                        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 31 March
2005:


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



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]




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