6 August 2021

TRITAX BIG BOX REIT PLC

(the "Company")

ISSUE OF ORDINARY SHARES AND PDMR SHAREHOLDINGS

The Board of the Company announces that in accordance with the terms of the Investment Management Agreement between the Company and Tritax Management LLP (the "Manager") dated 11 September 2017 pursuant to which 25 percent of the management fee (net of any applicable tax) is payable in new ordinary shares of the Company ("Ordinary Shares") the Company will issue 838,725 Ordinary Shares to the partners, certain staff of the Manager, including the persons discharging managerial responsibilities ("PDMRs") referred to below and Aberdeen Standard Investments ("Abrdn") following its acquisition of a 60% stake in the Manager in April 2021. The shares will be issued at a price of 188.57p per Ordinary Share, being the most recently published IFRS net asset value per Ordinary Share as at 30 June 2021.

Following Board approval on 4 August 2021, an application has been made for the Ordinary Shares to be admitted to the premium segment of the Official List and to trading on the main market of the London Stock Exchange. It is expected that dealings in the Ordinary Shares will commence at 8am on 9 August 2021 ("Admission").

Immediately following Admission, the Company's issued share capital will consist of 1,720,722,487 Ordinary Shares carrying one vote each. The Company does not hold any shares in treasury. Therefore, following Admission, the total number of voting rights in the Company will be 1,720,722,487. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the FCA's Disclosure Guidance and Transparency Rules.

PDMR Shareholdings

In accordance with article 19.3 of the Market Abuse Regulation, immediately following Admission, the beneficial interests of certain persons discharging managerial decisions ("PDMRs") (and/or persons closely associated thereof) will be as follows:

^{1 112,382 shares have been acquired by Harriet Godfrey (PCA of Colin Godfrey)}

^{2 19,029 shares have been acquired by Lianne Hobart (PCA of Bjorn Hobart)}

^{3 13,244 shares have been acquired by Martine Whitehead (PCA of Frankie Whitehead).}

^{4 Phil Redding became a PDMR of the Company on 9 March 2021.}

^{**In respect of the staff of Tritax Management LLP, these figures only include Ordinary Shares issued or purchased pursuant to the management fee arrangements.}

FOR FURTHER INFORMATION, PLEASE CONTACT:

The Company's LEI is: 213800L6X88MIYPVR714

NOTES:

Tritax Big Box REIT plc (ticker: BBOX) is the only listed vehicle dedicated to investing in very large logistics warehouse assets (Big Boxes) in the UK and is committed to delivering attractive and sustainable returns for Shareholders. Investing in and actively managing existing built investments, land suitable for Big Box development and developments predominantly delivered through pre-let forward funded basis, the Company focuses on large, well-located, modern Big Box logistics assets, let to institutional-grade tenants on long-term leases (typically at least 12 years in length) with upward-only rent reviews and geographic and tenant diversification throughout the UK. The Company seeks to exploit the significant opportunity in this sub-sector of the UK logistics market owing to strong tenant demand and limited supply of Big Boxes.

The Company is a real estate investment trust to which Part 12 of the UK Corporation Tax Act 2010 applies (REIT), is listed on the premium segment of the Official List of the UK Financial Conduct Authority and is a constituent of the FTSE 250, FTSE EPRA/NAREIT and MSCI indices.

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

Notification of a Transaction pursuant to Article 19(1) of Regulation (EU) No. 596/2014