30 July 2025

SDCL Efficiency Income Trust plc

("SEIT" or the "Company")

Appointment of Non-Executive Director

The Board of Directors of SEIT is pleased to announce the appointment of Rosemary Boot as an independent Non-Executive Director of the Company, with effect from 1 August 2025.  Rosemary will also be appointed as a member of the Company's Audit and Risk, Remuneration, Nomination and Management Engagement Committees.

This appointment is part of the Company's previously announced succession planning as three current directors have been with the Company since its IPO in 2018.

Rosemary has knowledge of the wider low carbon technology sector, which has been built up over 20 years. She is an experienced non-executive director of alternative asset investment trusts, having served on the boards of Care REIT plc and Triple Point Energy Transition Trust plc as senior independent director. Other recent non-executive roles have included Southern Water and trustee of Green Alliance. She is currently a non-executive director of Urban&Civic plc, the UK master developer, where she chairs the sustainability and health and safety committee; Nido Living, the European purpose-built student accommodation platform, where she chairs the audit and risk committee; and she is a co-founder and non-executive director of Chapter Zero Limited.

There is no further information to be disclosed under UK Listing Rule 6.4.8R.

For Further Information

LEI: 213800ZPSC7XUVD3NL94

About SEIT

SDCL Efficiency Income Trust plc is a constituent of the FTSE 250 index. It was the first UK listed company of its kind to invest exclusively in the energy efficiency sector. Its projects are primarily located in North America, the UK and Europe 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, a portfolio of on-site energy recycling, cogeneration and process efficiency projects, servicing the largest steel blast furnace in the United States 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 with a stable dividend income, capital preservation and the opportunity for capital growth. The Company is targeting a dividend of 6.36p per share in respect of the financial year to 31 March 2026. SEIT's last published NAV was 90.6p per share as at 31 March 2025.

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

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

Investment Manager

SEIT'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 Hong Kong and Singapore. SDCL is authorised and regulated in the UK by the Financial Conduct Authority.

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