Issue of New Shares

Henderson High Income Trust PLC
30 April 2007

HENDERSON GLOBAL INVESTORS

HENDERSON HIGH INCOME TRUST PLC


30 APRIL 2007



                        Henderson High Income Trust plc

                          Issue of New Ordinary Shares


The Board of Henderson High Income Trust plc announces that 16,148,421 New
Ordinary Shares of 5p each will be issued in connection with the reconstruction
of Martin Currie Income & Growth Trust plc.


Application has been made to the UK Listing Authority to list the New Ordinary
Shares on the Official List. The New Ordinary Shares will be issued at 183.1
pence per share to holders of MCIGT who elected, or were deemed to have elected,
to receive them.


The New Ordinary shares will rank pari passu with the existing shares. As a
result of the issue, the Company will have 85,836,219 shares in issue.


Dealings in the New Ordinary Shares are expected to commence at 8 a.m. on 1 May
2007.


Terms used in this announcement shall, unless the context requires otherwise,
bear the same meaning given to them in the Company's circular to shareholders
dated 22 March 2007.



The Board of Henderson High Income Trust plc would like to take this opportunity
to welcome in excess of 600 new shareholders to the Company.





                                    - ENDS -





Enquires:

James de Sausmarez                                        020 7818 3349
Henderson Global Investors


Melville Trimble                                           020 7213 8898
PricewaterhouseCoopers LLP







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