Dividend Declaration

Henderson High Income Trust PLC
21 November 2007


HENDERSON HIGH INCOME TRUST PLC

HENDERSON GLOBAL INVESTORS

21 NOVEMBER 2007


                        HENDERSON HIGH INCOME TRUST PLC

                       PAYMENT OF THIRD INTERIM DIVIDEND


Henderson High Income Trust plc announces that a third interim dividend of
2.075p per Ordinary Share of 5p, in respect of the year ending 31 December 2007,
will be paid on 31 January 2008 to holders registered at the close of business
on 4 January 2008. The shares will be quoted ex-dividend on 2 January 2008.


                                    - ENDS -


For further information please contact:

Alex Crooke
Henderson Global Investors
Telephone:  [phone]

James de Sausmares
Head of Investment Trusts
Henderson Global Investors
Telephone:  [phone]



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