THIS ANNOUNCEMENT IS RESTRICTED AND IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA, JAPAN, SOUTH AFRICA OR ANY OTHER JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF THAT JURISDICTION.

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 (WHICH FORMS PART OF DOMESTIC UK LAW PURSUANT TO THE EUROPEAN UNION (WITHDRAWAL) ACT 2018, AS AMENDED ("UK MAR")).

THIS ANNOUNCEMENT IS FOR INFORMATIONAL PURPOSES ONLY, AND DOES NOT CONSTITUTE OR FORM PART OF ANY OFFER OR INVITATION TO SELL OR ISSUE, OR ANY SOLICITATION OF AN OFFER TO PURCHASE OR SUBSCRIBE FOR, ANY SECURITIES OF BIG YELLOW GROUP PLC.

THIS ANNOUNCEMENT IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO, OR TO ANY PERSON LOCATED OR RESIDENT IN, ANY JURISDICTION WHERE IT IS UNLAWFUL TO RELEASE, PUBLISH OR DISTRIBUTE THIS ANNOUNCEMENT.

THIS ANNOUNCEMENT AMOUNTS TO A FINANCIAL PROMOTION FOR THE PURPOSES OF SECTION 21 OF THE FINANCIAL SERVICES AND MARKETS ACT 2000 ("FSMA") AND HAS BEEN APPROVED BY PRIMARYBID LIMITED WHICH IS AUTHORISED AND REGULATED BY THE FINANCIAL CONDUCT AUTHORITY (FRN 779021).

10 October 2023

Big Yellow Group PLC

("Big Yellow" the "Group" or the "Company")

PrimaryBid Offer

? Big Yellow announces a conditional offer for subscription of new Ordinary Shares via PrimaryBid;

? The issue price for the new Ordinary Shares will be determined at the close of the bookbuilding process;

? Investors can access the PrimaryBid Offer through PrimaryBid's website and on PrimaryBid's app;

? Investors may also be able to take part through PrimaryBid's extensive network of retail brokers, wealth managers and investment platforms, (subject to such partners' participation), which includes AJ Bell, Hargreaves Lansdown and interactive investor;

? Applications for new Ordinary Shares through these partners can be made from tax efficient savings vehicles such as ISAs or SIPPs, as well as General Investment Accounts ("GIAs");

? The PrimaryBid Offer is available to both existing shareholders and new investors;

? The issue price for the new Ordinary Shares will be equal to the Placing Price;

? There is a minimum subscription of £250 per investor in the PrimaryBid Offer; and

? No commission will be charged by PrimaryBid on applications to the PrimaryBid Offer.

PrimaryBid Offer

Big Yellow (LON: BYG), is pleased to announce a conditional offer for subscription of new ordinary shares of 10 pence each in the capital of the Company ("Ordinary Shares") via PrimaryBid (the "PrimaryBid Offer"). The Company is also conducting a placing of new Ordinary Shares by way of an accelerated bookbuilding process (the "Placing") as announced by the Company earlier today. The issue price of the new Ordinary Shares to be issued pursuant to the PrimaryBid Offer and the Placing will be determined following the close of the bookbuilding process.

The PrimaryBid Offer is conditional on the new Ordinary Shares to be issued pursuant to the PrimaryBid Offer and the Placing being admitted to the premium listing segment of the Official List of the Financial Conduct Authority and admitted to trading on the main market for listed securities of London Stock Exchange plc ("Admission"). Admission is expected to take place at 8.00 a.m. on 13 October 2023. The PrimaryBid Offer will not be completed without the Placing also being completed.

The Company will use the gross proceeds to build out the Group's existing pipeline of stores.

Reason for the PrimaryBid Offer

While the Placing has been structured as a non-pre-emptive offer within the Company's existing authorities from shareholders for non-pre-emptive offers so as to minimise cost and time to completion, the Company values its retail investor base and is therefore pleased to provide retail investors with the opportunity to participate in the PrimaryBid Offer in line with the Pre-Emption Group guidelines.

Existing shareholders and new investors can access the PrimaryBid Offer through PrimaryBid's website and on PrimaryBid's app. The PrimaryBid app is available on the UK Apple App Store and Google Play Store.

Investors can also participate through PrimaryBid's extensive partner network of investment platforms, retail brokers and wealth managers, subject to such partners' participation. Participating partners include:

· AJ Bell;

· Hargreaves Lansdown; and

· interactive investor.

Applications for new Ordinary Shares through participating partners can be made from tax efficient savings vehicles such as ISAs or SIPPs, as well as GIAs. Some partners may only accept applications from existing shareholders.

After consideration of the various options available to it, the Company believes that the separate PrimaryBid Offer is in the best interests of shareholders, as well as wider stakeholders in the Company.

The PrimaryBid Offer will open to investors resident and physically located in the United Kingdom following the release of this Announcement. The PrimaryBid Offer is expected to close at 8 p.m. on 10 October 2023 and may close early if it is oversubscribed.

There is a minimum subscription amount of £250 per investor in the PrimaryBid Offer.

The Company reserves the right to scale back any order at its discretion. The Company and PrimaryBid reserve the right to reject any application for subscription under the PrimaryBid Offer without giving any reason for such rejection.

Investors who apply for new Ordinary Shares through PrimaryBid's website or PrimaryBid's app will not be charged any fee or commission by PrimaryBid. It is vital to note that once an application for new Ordinary Shares has been made and accepted via PrimaryBid, that application cannot be withdrawn.

Investors wishing to apply for new Ordinary Shares through their investment platform, retail broker or wealth manager using their ISA, SIPP or GIA should contact them for details of their terms and conditions, process and any relevant fees or charges.

The new Ordinary Shares to be issued pursuant to the PrimaryBid Offer will be issued free of all liens, charges and encumbrances and will, when issued and fully paid, rank pari passu in all respects with the new Ordinary Shares to be issued pursuant to the Placing and the Company's existing Ordinary Shares.

For further information on PrimaryBid, the PrimaryBid Offer or for a copy of the terms and conditions (including the procedure for application and payment for new Ordinary Shares) that apply to registered users of PrimaryBid in addition to the terms and conditions set out in this Announcement, visit www.PrimaryBid.com or email PrimaryBid at enquiries@primarybid.com.

Brokers wishing to offer their customers access to the PrimaryBid Offer and future PrimaryBid transactions, should contact partners@primarybid.com.

Enquiries

Important notices

The PrimaryBid Offer is offered under the exemptions from the need for a prospectus allowed under the prospectus regulation rules made by the FCA pursuant to Part VI of FSMA, as revised from time to time (the "Prospectus Regulation Rules"). As such, there is no need for publication of a prospectus pursuant to the Prospectus Regulation Rules, or for approval of the same by the Financial Conduct Authority (as competent authority under Regulation (EU) 2017/1129 as it forms part of retained EU law as defined in the European Union (Withdrawal) Act 2018).

The PrimaryBid Offer is not being made into the United States, Australia, Canada, Japan, the Republic of South Africa or any other jurisdiction where it would be unlawful to do so.

This Announcement is not for publication or distribution, directly or indirectly, in or into the United States of America. This Announcement is for information purposes only and is not an offer of securities for sale into the United States. The securities referred to herein have not been and will not be registered under the US Securities Act of 1933, as amended (the "US Securities Act"), or under the securities laws of any state or other jurisdiction of the United States, and may not be offered, sold, resold, transferred or delivered, directly or indirectly, in or into the United States except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the US Securities Act and in accordance with any applicable securities laws of any state or other jurisdiction of the United States. There will be no public offer of the securities referred to herein in the United States or any other jurisdiction. The PrimaryBid Offer is not available to persons in the United States. No money, securities or other consideration from any person inside the United States is being solicited and, if sent in response to the information contained in this Announcement, will not be accepted.

This Announcement and the information contained herein, is restricted and is not for publication, release or distribution, directly or indirectly, in whole or in part, in or into the United States, Australia, Canada, Japan, the Republic of South Africa or any other jurisdiction in which such publication, release or distribution would be unlawful. Further, this Announcement is for information purposes only and is not an offer of securities in any jurisdiction.

This Announcement contains (or may contain) certain forward-looking statements, beliefs or opinions, with respect to certain of the Company's current expectations and projections about future performance, anticipated events or trends and other matters that are not historical facts. These forward-looking statements, which sometimes use words such as "aim", "anticipate", "believe", "intend", "plan" "estimate", "expect" and words of similar meaning or the negative thereof, include all matters that are not historical facts and reflect the Company's directors' beliefs and expectations and involve a number of risks, uncertainties and assumptions that could cause actual results and performance to differ materially from any expected future results or performance expressed or implied by the forward-looking statement. These statements are subject to unknown risks, uncertainties and other factors that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. Statements contained in this Announcement regarding past trends or activities should not be taken as a representation that such trends or activities will continue in the future. The information contained in this Announcement is subject to change without notice and, except as required by applicable law, neither the Company nor its respective directors, officers, employees, agents, affiliates or advisers assume any responsibility or obligation to update, amend or revise publicly or review any of the forward-looking statements contained in this Announcement. You should not place undue reliance on forward-looking statements, which speak only as of the date of this Announcement. Any indication in this Announcement of the price at which the Company's shares have been bought or sold in the past cannot be relied upon as a guide to future performance. No statement in this Announcement is or is intended to be a profit forecast or profit estimate or to imply that the earnings of the Company for the current or future financial years will necessarily match or exceed the historical or published earnings of the Company. The price and value of securities can go down as well as up. Past performance of the Company cannot be relied on as a guide to future performance. Persons reading this Announcement are cautioned not to place undue reliance on such forward-looking statements.

Investors should make their own investigations into the merits of an investment in the Company. Nothing in this Announcement amounts to a recommendation to invest in the Company or amounts to investment, taxation or legal advice.

It should be noted that a subscription for new Ordinary Shares and investment in the Company carries a number of risks. Investors should consider the risk factors set out on www.PrimaryBid.com and the PrimaryBid app before making a decision to subscribe for new Ordinary Shares. Investors should take independent advice from a person experienced in advising on investment in securities such as the new Ordinary Shares if they are in any doubt.

END