Exhibit 99.1 Barclays PLC This exhibit includes portions from the previously published Results Announcement of Barclays PLC relating to the three months ended 31 March 2024, as amended in part to comply with the requirements of Regulation G and Item 10(e) of Regulation S-K promulgated by the US Securities and Exchange Commission (SEC), including the reconciliation of certain financial information to comparable measures prepared in accordance with International Financial Reporting Standards (IFRS). The purpo ...