Henderson High Income Trust Regulatory News (HHI)

The Company announces that at the Annual General Meeting held earlier today all resolutions proposed were duly passed, three of which were special resolutions authorising:

- that up to 10% of the share capital may be issued or sold out of treasury without first offering them to existing shareholders in accordance with statutory pre-emption procedures; and

- the Company to make market purchases of its own ordinary shares up to a maximum of 14.99% (equivalent to 19,362,774 ordinary shares as at today's date) at the maximum price per share (exclusive of expenses) not exceeding the higher of:

i) 5% above the average market price of the equity shares for the five business days prior to the day the purchase is made; and

ii) the amount being the higher price of the last independent trade and the highest current independent bid on the London Stock Exchange for a share in the Company.

Shares repurchased will be either held in treasury or cancelled; and

- that a general meeting other than an annual general meeting may be called on not fewer than 14 clear days' notice.

The Board are pleased that all resolutions were duly passed and would like to thank shareholders for their continued support.

The full text of the resolutions can be found in the Notice of Meeting to shareholders dated 31 March 2022 which can be viewed on the Company's website at: www.hendersonhighincome.com.

A copy of the resolutions will be submitted to the National Storage Mechanism ('NSM') and will shortly be available for inspection on the NSM's website at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

Harriet Hall

Investment Trust PR Manager

Janus Henderson Investors

Tel: 020 7818 2919

Samantha McDonald

For and on behalf of Janus Henderson Secretarial Services UK Limited

Corporate Secretary to Henderson High Income Trust plc

Telephone: 020 7818 2936

David Smith

Fund Manager

Henderson High Income Trust plc

Telephone: 020 7818 4443