You are given a text that consists of multiple sentences. Your task is to perform abstractive summarization on this text. Use your understanding of the content to express the main ideas and crucial details in a shorter, coherent, and natural sounding text.

LONDON--(BUSINESS WIRE)-- FORM 8.3 PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE Rule 8.3 of the Takeover Code (the Code) 1. KEY INFORMATION Barclays PLC. SIGNATURE AVIATION PLC 18 March 2021 NO 2. POSITIONS OF THE PERSON MAKING THE DISCLOSURE If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security. (a) Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any) Interests Short Positions Number (%) Number (%) (1) 31,467,078 3.80% 11,704,942 1.41% (2) 11,536,206 1.39% 29,917,492 3.61% (3) 0 0.00% 0 0.00% 43,003,284 5.19% 41,622,434 5.02% All interests and all short positions should be disclosed. Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions). (b) Rights to subscribe for new securities (including directors and other employee options) Class of relevant security in relation to which subscription right exists: Details, including nature of the rights concerned and relevant percentages: 3. DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in. The currency of all prices and other monetary amounts should be stated. (a) Purchases and sales 37p ordinary Purchase 552 3.9925 GBP 37p ordinary Purchase 601 3.9920 GBP 37p ordinary Purchase 1,056 3.9990 GBP 37p ordinary Purchase 1,287 3.9930 GBP 37p ordinary Purchase 1,515 4.0004 GBP 37p ordinary Purchase 1,673 3.9740 GBP 37p ordinary Purchase 2,265 4.0030 GBP 37p ordinary Purchase 2,291 3.9957 GBP 37p ordinary Purchase 5,880 3.9815 GBP 37p ordinary Purchase 12,001 3.9945 GBP 37p ordinary Purchase 12,498 3.9741 GBP 37p ordinary Purchase 14,200 3.9895 GBP 37p ordinary Purchase 89,718 3.9836 GBP 37p ordinary Purchase 110,988 3.9980 GBP 37p ordinary Sale 612 3.9970 GBP 37p ordinary Sale 864 3.9920 GBP 37p ordinary Sale 1,541 3.9750 GBP 37p ordinary Sale 2,045 4.0123 GBP 37p ordinary Sale 2,265 4.0034 GBP 37p ordinary Sale 2,626 4.0045 GBP 37p ordinary Sale 3,349 3.9981 GBP 37p ordinary Sale 4,394 3.9969 GBP 37p ordinary Sale 5,324 4.0030 GBP 37p ordinary Sale 9,451 3.9984 GBP 37p ordinary Sale 10,958 3.9743 GBP 37p ordinary Sale 14,134 3.9740 GBP 37p ordinary Sale 19,074 3.9983 GBP 37p ordinary Sale 34,809 3.9916 GBP 37p ordinary Sale 74,108 3.9980 GBP (b) Cash-settled derivative transactions Class of Product Nature of dealing Number of Price per relevant description reference unit security securities 37p ordinary SWAP Long 1,523 4.0200 GBP 37p ordinary CFD Long 14,134 3.9740 GBP 37p ordinary SWAP Long 36,195 3.9916 GBP 37p ordinary SWAP Short 1,763 3.9949 GBP 37p ordinary SWAP Short 22,902 3.9942 GBP 37p ordinary SWAP Short 38,490 3.9740 GBP 37p ordinary SWAP Short 41,134 3.9905 GBP (c) Stock-settled derivative transactions (including options) (i) Writing, selling, purchasing or varying Class of relevant security Product description e.g. call option Writing, purchasing, selling, varying etc. Number of securities to which option relates Exercise price per unit Type e.g. American, European etc. Expiry date Option money paid/ received per unit (ii) Exercise Class of relevant security Product description e.g. call option Exercising/ exercised against Number of securities Exercise price per unit (d) Other dealings (including subscribing for new securities) Class of relevant security Nature of dealing e.g. subscription, conversion Details Price per unit (if applicable) 4. OTHER INFORMATION (a) Indemnity and other dealing arrangements Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer: Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state none None (b) Agreements, arrangements or understandings relating to options or derivatives Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to: (i) the voting rights of any relevant securities under any option; or (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced: If there are no such agreements, arrangements or understandings, state none None (c) Attachments 19 Mar 2021 Large Holdings Regulatory Operations 020 3134 7213 Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service. The Panels Market Surveillance Unit is available for consultation in relation to the Codes disclosure requirements on +44 (0)20 7638 0129. *If the discloser is a natural person, a telephone number does not need to be included, provided contact information has been provided to the Panels Market Surveillance Unit. The Code can be viewed on the Panels website at www.thetakeoverpanel.org.uk.

Answer: Form 8.3 - SIGNATURE AVIATION PLC