23 September 2021

SDCL Energy Efficiency Income Trust plc

("SEEIT" or the "Company")

Inclusion in FTSE 250 Index

SDCL Energy Efficiency Income Trust plc is pleased to announce that following the changes in the FTSE UK Index Series announced on 17 September 2021, the Company has been included as a constituent of the FTSE 250 Index.

SDCL Energy Efficiency Income Trust plc is the first UK listed company of its kind to invest exclusively in the energy efficiency sector and listed on the London Stock Exchange in December 2018.

For Further Information

About SEEIT

SDCL Energy Efficiency Income Trust plc is the first UK listed company of its kind to invest exclusively in the energy efficiency sector. Its projects are primarily located in the UK, Europe and North America and include, inter alia, a portfolio of cogeneration assets in Spain, a portfolio of commercial and industrial solar and storage projects in the United States, a regulated gas distribution network in Sweden and a district energy system providing essential and efficient utility services on one of the largest business parks in the United States.

The Company aims to deliver shareholders value through its investment in a diversified portfolio of energy efficiency projects which are driven by the opportunity to deliver lower cost, cleaner and more reliable energy solutions to end users of energy.

The Company is targeting an attractive total return for shareholders of 7-8 per cent. per annum (net of fees and expenses and by reference to the initial issue price of £1.00 per Ordinary Share), with a stable dividend income, capital preservation and the opportunity for capital growth. The Company is targeting a dividend of 5.62p per share in respect of the financial year to 31 March 2022. SEEIT's last published NAV was 102.5p per share as at 31 March 2021.

Past performance cannot be relied on as a guide to future performance.

Further information can be found on the Company's website at www.seeitplc.com.

Investment Manager

SEEIT's Investment Manager is Sustainable Development Capital LLP ("SDCL"), an investment firm established in 2007, with a proven track record of investment in energy efficiency and decentralised generation projects in the UK, Continental Europe, North America and Asia.

SDCL is headquartered in London and also operates worldwide from offices in New York, Dublin, Madrid, Hong Kong and Singapore. SDCL is authorised and regulated in the UK by the Financial Conduct Authority.

Further information can be found at www.sdclgroup.com.