Henderson High Income Trust Regulatory News (HHI)

JANUS HENDERSON FUND MANAGEMENT UK LIMITED

HENDERSON HIGH INCOME TRUST PLC

LEGAL ENTITY IDENTIFIER 213800OEXAGFSF7Y6G11

21 September 2023

HENDERSON HIGH INCOME TRUST PLC

Half Year Update for the half year ended 30 June 2023

The Company released its Half Year Report for the six months ended 30 June 2023 on 13 September 2023. A copy of the report is available to download from the Company's website: www.hendersonhighincome.com.

An abridged extract from the Half Year Report (the Half Year Update) has been sent to shareholders. The Half-Year Update has been submitted to the National Storage Mechanism and will shortly be available for inspection at https://data.fca.org.uk/#/nsm/nationalstoragemechanism. The update is also available to download from the Company's website www.hendersonhighincome.com.

For further information please contact:

Samantha McDonald

For and on behalf of Janus Henderson Secretarial Services UK Limited

Corporate Secretary to Henderson High Income Trust plc

Tel. 020 7818 2936

Harriet Hall

Investment Trust PR Manager

Janus Henderson Investors

Telephone: 020 7818 2919

Neither the contents of the Company's website nor the contents of any website accessible from hyperlinks on the Company's website (or any other website) is incorporated into, or forms part of, this announcement.