7 April 2026

Tritax Big Box REIT plc

(the "Company")

NOTICE OF ANNUAL GENERAL MEETING

The Board of Directors of Tritax Big Box REIT plc (ticker: BBOX) announces that the Annual General Meeting ("AGM") of the Company will be held on Thursday 7 May 2026 at 10.00 a.m at the offices of Ashurst LLP, London Fruit & Wool Exchange, 1 Duval Square, London E1 6PW.

In accordance with UK Listing Rule 6.4.1R, copies of the following documents have been submitted to the National Storage Mechanism and will shortly be available at https://data.fca.org.uk/#/nsm/nationalstoragemechanism:

1.     Notice of 2026 Annual General Meeting;

2.     Form of Proxy;

3.     2025 Annual Report; and

4.     2025 Annual Report in Structured Electronic Format ("ESEF").

The above documents have been posted to Shareholders, who have requested to receive paper documentation, and all documents are also available on the Company's website at www.tritaxbigbox.co.uk.

As at today's date the Company has 2,702,122,165 ordinary shares in issue, all of which have voting rights.

FOR FURTHER INFORMATION, PLEASE CONTACT:

The Company's LEI is: 213800L6X88MIYPVR714

Notes:

Tritax Big Box REIT plc (ticker: BBOX) is the largest listed investor in high-quality logistics warehouse assets and controls the largest logistics-focused land platform in the UK. Tritax Big Box targets attractive and sustainable returns for shareholders by investing in and actively managing existing built investments and land suitable for logistics development. The Company focuses on well-located, modern logistics assets, typically let to institutional-grade clients on long-term leases with upward-only rent reviews and geographic and client diversification throughout the UK. Additionally, having adopted a "power first" approach, the Company has recently secured its first data centre development opportunities (amounting to over 250MW), and has a pipeline of c.1-gigawatt of further opportunities, offering the potential to deliver exceptional returns on an accelerated basis.

The Company is a real estate investment trust to which Part 12 of the UK Corporation Tax Act 2010 applies, is listed on the Official List of the UK Financial Conduct Authority and is a constituent of the FTSE 100, FTSE EPRA/NAREIT and MSCI indices.

Further information on Tritax Big Box REIT is available at www.tritaxbigbox.co.uk