Rule 8.3 - O2 PLC

FORM 8.3 DEALINGS BY PERSONS WHO OWN OR CONTROL 1% OR MORE OF ANY CLASS OF RELEVANT SECURITY (Rule 8.3 of The City Code on Takeovers and Mergers) Name of purchaser/vendor * BARCLAYS PLC Company dealt in O2 PLC Relevant security dealt in ORD GBP 0.001 If a connected EFM, name of offeree/offeror with which connected If a connected EFM, nature of connection # Date of dealing 03 NOVEMBER 2005 DEALINGS † Amount bought Price per unit (currency must be stated) 4,727 Transfer 10,361 1.9750 941,270 1.9775 Amount sold Price per unit (currency must be stated) 1,700 1.9753 2,300 1.9728 4,000 1.9781 4,502 1.9757 25,000 2.0925 30,778 1.9773 Resultant total amount and percentage of the same relevant security owned or controlled 271,479,452 (3.09%) IS A SUPPLEMENTAL FORM 8 (DERIVATIVE)/FORM 8 (OPTION) ATTACHED? YES Date of disclosure 04 NOVEMBER 2005 Contact name BARCLAYS CORPORATE SECRETARIAT Telephone number 0207 116 2913 *Specify the owner or controller in addition to the person dealing. The naming of nominees or vehicle companies is insufficient. In the case of disclosure of dealings by fund managers on behalf of discretionary clients, the clients need not be named. #See the definition of "connected fund managers and principal traders" in the Definitions Section of the Code. †If disclosing dealings/holdings in derivatives or options, please attach Supplemental Form 8 (Derivative) or Supplemental Form 8 (Option), as appropriate. For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk. SUPPLEMENTAL FORM 8 (DERIVATIVE) DEALINGS/HOLDINGS IN DERIVATIVES (This form should be attached to Form 8.1, Form 8.1(b)(ii), Form 8.2 or Form 8.3, as appropriate) Description of all derivative products disclosed on CFD - A purchaser of a CFD will realise a gain if this form the price of the underlying security goes up. A seller of a CFD will realise a gain if the price of the underlying security goes down. The CFD contracts are open ended and there is no rollover into new contracts. Full details of any agreement, arrangement or None understanding between the person disclosing and any other person relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated. WRITING/ENTERING INTO A DERIVATIVE Product name Transaction Writing/entering Number of securities to Reference Maturity eg long CFD date into (indicate as which the derivative is price date applicable) referenced (currency must be stated) CLOSING OUT A DERIVATIVE Product name Transaction Number of securities to which the Reference price Closing out price eg long CFD date derivative is referenced (currency must (currency must be be stated) stated) DETAILS OF OPEN DERIVATIVES (excluding any transaction set out above) Product name Transaction Written/ Number of Reference price Maturity date eg long CFD date entered into securities (currency (indicate as to which the must be stated) applicable) derivative is referenced Long CFD 14/03/2005 Written 1,100,851 1.2672 Long CFD 14/03/2005 Written 20,000 1.2700 Long CFD 14/03/2005 Written 168,616 0.0000 Long CFD 14/03/2005 Written 1,050,000 0.0000 Long CFD 15/03/2005 Written 155,477 1.2684 Long CFD 15/03/2005 Written 1,141,488 1.2657 Long CFD 16/03/2005 Written 386,060 1.2411 Long CFD 17/03/2005 Written 53,719 1.2491 Long CFD 17/03/2005 Written 338,627 1.2397 Long CFD 18/03/2005 Written 249,053 1.2366 Long CFD 18/03/2005 Written 47,918 1.2350 Long CFD 21/03/2005 Written 20,000 1.2375 Long CFD 22/03/2005 Written 10,000 1.1975 Long CFD 22/03/2005 Written 226,800 1.1961 Long CFD 29/03/2005 Written 589,557 1.1599 Long CFD 29/03/2005 Written 169,000 1.1594 Long CFD 30/03/2005 Written 1,333,642 1.1667 Long CFD 31/03/2005 Written 743,697 1.1901 Long CFD 01/04/2005 Written 2,474,307 1.2165 Long CFD 01/04/2005 Written 88,000 1.2202 Long CFD 04/04/2005 Written 40,000 1.2031 Long CFD 05/04/2005 Written 2,319,967 1.2119 Long CFD 05/04/2005 Written 10,000 1.2200 Long CFD 06/04/2005 Written 572,180 1.2251 Long CFD 06/04/2005 Written 796,411 1.2107 Long CFD 08/04/2005 Written 20,000 1.2275 Long CFD 11/04/2005 Written 40,000 1.2319 Long CFD 11/04/2005 Written 302 1.2244 Long CFD 12/04/2005 Written 279,872 1.2175 Long CFD 12/04/2005 Written 30,000 1.2125 Long CFD 13/04/2005 Written 2,990 1.2199 Long CFD 13/04/2005 Written 72,051 1.2259 Long CFD 14/04/2005 Written 10,000 1.2250 Long CFD 15/04/2005 Written 10,000 1.1900 Long CFD 19/04/2005 Written 236,560 1.1547 Long CFD 19/04/2005 Written 87,169 1.1575 Long CFD 21/04/2005 Written 158,998 1.1474 Long CFD 25/04/2005 Written 64,338 1.1474 Long CFD 26/04/2005 Written 10,000 1.1650 Long CFD 27/04/2005 Written 10,000 1.1500 Long CFD 28/04/2005 Written 20,000 1.1838 Long CFD 29/04/2005 Written 276,849 1.1706 Long CFD 29/04/2005 Written 110,056 1.1719 Long CFD 03/05/2005 Written 35,290 1.1710 Long CFD 03/05/2005 Written 84,904 1.1678 Long CFD 05/05/2005 Written 20,000 1.1600 Long CFD 06/05/2005 Written 95,643 1.1628 Long CFD 10/05/2005 Written 20,000 1.1763 Long CFD 11/05/2005 Written 10,000 1.1600 Long CFD 12/05/2005 Written 60,000 1.1625 Long CFD 13/05/2005 Written 50,000 1.1560 Long CFD 16/05/2005 Written 55,000 1.1511 Long CFD 17/05/2005 Written 2,614,000 1.1600 Long CFD 19/05/2005 Written 79,557 1.2088 Long CFD 19/05/2005 Written 280,000 1.1942 Long CFD 19/05/2005 Written 500,000 1.2032 Long CFD 20/05/2005 Written 250,000 1.2488 Long CFD 23/05/2005 Written 20,583 1.2500 Long CFD 24/05/2005 Written 268,490 1.2474 Long CFD 24/05/2005 Written 19,792 1.2462 Long CFD 25/05/2005 Written 18,508 1.2475 Long CFD 25/05/2005 Written 250,000 1.2488 Long CFD 26/05/2005 Written 39,117 1.2525 Long CFD 26/05/2005 Written 10,000 1.2525 Long CFD 26/05/2005 Written 500,000 1.2681 Long CFD 31/05/2005 Written 292,590 1.2772 Long CFD 01/06/2005 Written 10,000 1.2575 Long CFD 03/06/2005 Written 103,616 1.2344 Long CFD 08/06/2005 Written 99,428 1.2444 Long CFD 09/06/2005 Written 195,741 1.2433 Long CFD 10/06/2005 Written 26,681 1.2638 Long CFD 10/06/2005 Written 42,000 1.2725 Long CFD 10/06/2005 Written 250,000 1.2687 Long CFD 13/06/2005 Written 19,554 1.2627 Long CFD 13/06/2005 Written 147,498 1.2561 Long CFD 14/06/2005 Written 47,000 1.2714 Long CFD 14/06/2005 Written 3,646 1.2699 Long CFD 15/06/2005 Written 404,114 1.2700 Long CFD 16/06/2005 Written 539,434 1.2775 Long CFD 16/06/2005 Written 23,185 1.2834 Long CFD 20/06/2005 Written 280,539 1.2831 Long CFD 20/06/2005 Written 238,475 1.2808 Long CFD 21/06/2005 Written 260,457 1.2814 Long CFD 21/06/2005 Written 10,000 1.2825 Long CFD 22/06/2005 Written 231,588 1.2777 Long CFD 22/06/2005 Written 1,225,187 1.2758 Long CFD 23/06/2005 Written 91,356 1.2799 Long CFD 23/06/2005 Written 446,333 1.2698 Long CFD 24/06/2005 Written 20,000 1.2863 Long CFD 27/06/2005 Written 20,000 1.2675 Long CFD 27/06/2005 Written 45,338 1.2619 Long CFD 28/06/2005 Written 67,940 1.2816 Long CFD 28/06/2005 Written 100,000 1.2905 Long CFD 30/06/2005 Written 541,702 1.3594 Long CFD 30/06/2005 Written 866,779 1.3642 Long CFD 01/07/2005 Written 531,003 1.3451 Long CFD 04/07/2005 Written 63,600 1.3433 Long CFD 05/07/2005 Written 58,333 1.3245 Long CFD 05/07/2005 Written 113,797 1.3236 Long CFD 06/07/2005 Written 168,898 1.3350 Long CFD 06/07/2005 Written 1,031,473 1.3355 Long CFD 06/07/2005 Written 137,744 1.3324 Long CFD 07/07/2005 Written 487,194 1.3345 Long CFD 08/07/2005 Written 93,200 1.3604 Long CFD 11/07/2005 Written 396,174 1.3568 Long CFD 13/07/2005 Written 88,500 1.3878 Long CFD 13/07/2005 Written 49,097 1.3836 Long CFD 14/07/2005 Written 103,417 1.3874 Long CFD 14/07/2005 Written 36,100 1.3861 Long CFD 15/07/2005 Written 55,953 1.3775 Long CFD 15/07/2005 Written 7,037 1.3775 Long CFD 18/07/2005 Written 63,074 1.3650 Long CFD 19/07/2005 Written 39,855 1.3786 Long CFD 21/07/2005 Written 180,547 1.3987 Long CFD 21/07/2005 Written 10,000 1.4025 Long CFD 22/07/2005 Written 30,000 1.4186 Long CFD 25/07/2005 Written 187,999 1.4211 Long CFD 27/07/2005 Written 1,113,737 1.3872 Long CFD 29/07/2005 Written 370,333 1.4018 Long CFD 01/08/2005 Written 12,172 1.3919 Long CFD 02/08/2005 Written 20,000 1.4100 Long CFD 02/08/2005 Written 16,012 1.4089 Long CFD 03/08/2005 Written 1,053,029 1.3961 Long CFD 04/08/2005 Written 473,387 1.3975 Long CFD 04/08/2005 Written 42,425 1.3948 Long CFD 05/08/2005 Written 35,707 1.3849 Long CFD 10/08/2005 Written 1,742,044 1.4379 Long CFD 10/08/2005 Written 109,604 1.4416 Long CFD 11/08/2005 Written 37,997 1.4461 Long CFD 12/08/2005 Written 20,000 1.4788 Long CFD 12/08/2005 Written 46,514 1.4760 Long CFD 15/08/2005 Written 1,999,325 1.4668 Long CFD 16/08/2005 Written 50,000 1.4190 Long CFD 16/08/2005 Written 100,000 1.4319 Long CFD 17/08/2005 Written 200,000 1.4456 Long CFD 17/08/2005 Written 37,375 1.4560 Long CFD 18/08/2005 Written 29,848 1.4883 Long CFD 18/08/2005 Written 370,537 1.4819 Long CFD 18/08/2005 Written 27,311 1.4885 Long CFD 18/08/2005 Written 350,000 1.4953 Long CFD 19/08/2005 Written 1,746,246 1.5285 Long CFD 19/08/2005 Written 13,731 1.5076 Long CFD 19/08/2005 Written 625,012 1.5333 Long CFD 19/08/2005 Written 150,000 1.5160 Long CFD 22/08/2005 Written 1,000,000 1.5299 Long CFD 23/08/2005 Written 1,000,000 1.5368 Long CFD 24/08/2005 Written 129,200 1.5252 Long CFD 26/08/2005 Written 39,200 1.5237 Long CFD 30/08/2005 Written 108,500 1.4975 Long CFD 30/08/2005 Written 785,762 1.4988 Long CFD 31/08/2005 Written 173,966 1.5276 Long CFD 31/08/2005 Written 20,000 1.5275 Long CFD 01/09/2005 Written 431,490 1.5490 Long CFD 01/09/2005 Written 349,456 1.5508 Long CFD 02/09/2005 Written 534,386 1.5489 Long CFD 05/09/2005 Written 15,700 1.5548 Long CFD 05/09/2005 Written 37,611 1.5587 Long CFD 06/09/2005 Written 282,000 1.5547 Long CFD 07/09/2005 Written 798,478 1.5380 Long CFD 09/09/2005 Written 64,944 1.5375 Long CFD 16/09/2005 Written 85,000 1.5573 Long CFD 19/09/2005 Written 27,300 1.5377 Long CFD 23/09/2005 Written 68,558 1.5489 Long CFD 26/09/2005 Written 24,300 1.5277 Long CFD 26/09/2005 Written 117,487 1.5316 Long CFD 30/09/2005 Written 15,376 1.5639 Long CFD 03/10/2005 Written 30,500 1.6340 Long CFD 05/10/2005 Written 167,475 1.6526 Long CFD 06/10/2005 Written 397,949 1.6464 Long CFD 07/10/2005 Written 275,600 1.6222 Long CFD 07/10/2005 Written 24,548 1.6398 Long CFD 11/10/2005 Written 20,000 1.6388 Long CFD 11/10/2005 Written 77,948 1.6392 Long CFD 12/10/2005 Written 30,000 1.6267 Long CFD 17/10/2005 Written 22,100 1.5950 Long CFD 18/10/2005 Written 16,551 1.5833 Long CFD 19/10/2005 Written 99,921 1.5650 Long CFD 19/10/2005 Written 126,582 1.5524 Long CFD 19/10/2005 Written 12,022 1.5650 Long CFD 21/10/2005 Written 378,340 1.5497 Long CFD 24/10/2005 Written 99,000 1.5772 Long CFD 25/10/2005 Written 176,000 1.6128 Long CFD 26/10/2005 Written 200,774 1.6233 Long CFD 26/10/2005 Written 20,000 1.6298 Long CFD 26/10/2005 Written 42,346 1.6167 Long CFD 27/10/2005 Written 42,736 1.6123 Long CFD 28/10/2005 Written 82,900 1.6320 Long CFD 28/10/2005 Written 395,092 1.6423 Short CFD 14/03/2005 Written 35,000 1.2583 Short CFD 14/03/2005 Written 2,574,000 0.0000 Short CFD 14/03/2005 Written 728,331 0.0000 Short CFD 15/03/2005 Written 42,061 1.2655 Short CFD 16/03/2005 Written 512,757 1.2491 Short CFD 16/03/2005 Written 255,270 1.2413 Short CFD 16/03/2005 Written 1,314,372 0.0000 Short CFD 16/03/2005 Written 1,550,464 0.0000 Short CFD 18/03/2005 Written 126,159 1.2409 Short CFD 21/03/2005 Written 500,000 1.2394 Short CFD 22/03/2005 Written 186,800 1.2001 Short CFD 22/03/2005 Written 10,000 1.1850 Short CFD 23/03/2005 Written 1,669,347 1.1563 Short CFD 23/03/2005 Written 446,545 1.1552 Short CFD 23/03/2005 Written 976,315 1.1513 Short CFD 24/03/2005 Written 679,389 1.1633 Short CFD 24/03/2005 Written 10,000 1.1625 Short CFD 29/03/2005 Written 360,855 1.1623 Short CFD 29/03/2005 Written 500,000 1.1592 Short CFD 30/03/2005 Written 781,929 1.1646 Short CFD 01/04/2005 Written 169,000 1.1925 Short CFD 04/04/2005 Written 727,479 1.2029 Short CFD 05/04/2005 Written 1,749,023 1.2173 Short CFD 07/04/2005 Written 308,400 1.2100 Short CFD 07/04/2005 Written 10,000 1.2100 Short CFD 11/04/2005 Written 168,918 1.2281 Short CFD 13/04/2005 Written 436,072 1.2216 Short CFD 14/04/2005 Written 61,905 1.2250 Short CFD 18/04/2005 Written 406,397 1.1632 Short CFD 18/04/2005 Written 40,000 1.1606 Short CFD 20/04/2005 Written 318,500 1.1521 Short CFD 20/04/2005 Written 370,831 1.1497 Short CFD 21/04/2005 Written 320,849 1.1458 Short CFD 21/04/2005 Written 1,086,121 1.1478 Short CFD 25/04/2005 Written 351,648 1.1462 Short CFD 25/04/2005 Written 362,979 1.1492 Short CFD 26/04/2005 Written 89,119 1.1666 Short CFD 27/04/2005 Written 39,400 1.1762 Short CFD 28/04/2005 Written 26,900 1.1669 Short CFD 04/05/2005 Written 386,391 1.1587 Short CFD 04/05/2005 Written 10,000 1.1575 Short CFD 06/05/2005 Written 50,000 1.1640 Short CFD 09/05/2005 Written 8,800 1.1600 Short CFD 09/05/2005 Written 40,000 1.1550 Short CFD 10/05/2005 Written 40,000 1.1681 Short CFD 13/05/2005 Written 10,000 1.1500 Short CFD 16/05/2005 Written 29,258 1.1476 Short CFD 17/05/2005 Written 10,000 1.1500 Short CFD 18/05/2005 Written 490,523 1.1591 Short CFD 19/05/2005 Written 130,500 1.2016 Short CFD 19/05/2005 Written 80,000 1.2069 Short CFD 20/05/2005 Written 520,549 1.2424 Short CFD 20/05/2005 Written 10,732 1.2475 Short CFD 20/05/2005 Written 352,219 1.2475 Short CFD 24/05/2005 Written 10,000 1.2550 Short CFD 27/05/2005 Written 20,000 1.2725 Short CFD 01/06/2005 Written 1,485,448 1.2580 Short CFD 03/06/2005 Written 51,749 1.2383 Short CFD 06/06/2005 Written 1,491,647 1.2255 Short CFD 06/06/2005 Written 60,000 1.2235 Short CFD 07/06/2005 Written 309,285 1.2527 Short CFD 08/06/2005 Written 20,000 1.2400 Short CFD 09/06/2005 Written 10,000 1.2450 Short CFD 16/06/2005 Written 26,100 1.2700 Short CFD 17/06/2005 Written 20,000 1.2850 Short CFD 21/06/2005 Written 74,755 1.2824 Short CFD 22/06/2005 Written 175,000 1.2773 Short CFD 23/06/2005 Written 289,755 1.2674 Short CFD 27/06/2005 Written 9,200 1.2800 Short CFD 30/06/2005 Written 9,900 1.3825 Short CFD 01/07/2005 Written 8,035 1.3426 Short CFD 04/07/2005 Written 35,737 1.3447 Short CFD 04/07/2005 Written 1,077,000 1.3425 Short CFD 05/07/2005 Written 141,251 1.3284 Short CFD 07/07/2005 Written 124,688 1.3072 Short CFD 07/07/2005 Written 77,435 1.3025 Short CFD 08/07/2005 Written 10,000 1.3525 Short CFD 11/07/2005 Written 9,070 1.3601 Short CFD 15/07/2005 Written 85,369 1.3575 Short CFD 19/07/2005 Written 29,847 1.3600 Short CFD 20/07/2005 Written 14,265 1.3915 Short CFD 20/07/2005 Written 5,857 1.3825 Short CFD 21/07/2005 Written 10,000 1.3875 Short CFD 22/07/2005 Written 192,647 1.4271 Short CFD 26/07/2005 Written 1,595,333 1.4295 Short CFD 26/07/2005 Written 1,476,711 1.4324 Short CFD 27/07/2005 Written 500,000 1.3825 Short CFD 27/07/2005 Written 30,000 1.3914 Short CFD 27/07/2005 Written 49,097 1.3889 Short CFD 28/07/2005 Written 100,000 1.3881 Short CFD 28/07/2005 Written 806,069 1.3922 Short CFD 28/07/2005 Written 36,100 1.3839 Short CFD 28/07/2005 Written 1,577,000 1.3935 Short CFD 29/07/2005 Written 50,000 1.4056 Short CFD 01/08/2005 Written 877,490 1.3868 Short CFD 02/08/2005 Written 413,508 1.3846 Short CFD 03/08/2005 Written 245,628 1.4125 Short CFD 05/08/2005 Written 277,968 1.3828 Short CFD 08/08/2005 Written 570,328 1.3882 Short CFD 09/08/2005 Written 242,498 1.4244 Short CFD 11/08/2005 Written 20,000 1.4488 Short CFD 11/08/2005 Written 150,000 1.4644 Short CFD 16/08/2005 Written 46,514 1.4289 Short CFD 17/08/2005 Written 1,022,521 1.4606 Short CFD 17/08/2005 Written 437,472 1.4577 Short CFD 17/08/2005 Written 654,860 1.4615 Short CFD 24/08/2005 Written 10,000 1.5250 Short CFD 30/08/2005 Written 45,400 1.5042 Short CFD 07/09/2005 Written 439,837 1.5374 Short CFD 09/09/2005 Written 11,200 1.5400 Short CFD 09/09/2005 Written 233 1.5327 Short CFD 13/09/2005 Written 10,000 1.5258 Short CFD 14/09/2005 Written 6,340 1.5052 Short CFD 15/09/2005 Written 294,400 1.5222 Short CFD 15/09/2005 Written 7,059 1.5152 Short CFD 15/09/2005 Written 37,375 1.5209 Short CFD 16/09/2005 Written 83,500 1.5365 Short CFD 19/09/2005 Written 123,900 1.5607 Short CFD 19/09/2005 Written 30,000 1.5410 Short CFD 20/09/2005 Written 15,176 1.5523 Short CFD 20/09/2005 Written 30,000 1.5600 Short CFD 21/09/2005 Written 187,701 1.5393 Short CFD 26/09/2005 Written 177,709 1.5891 Short CFD 27/09/2005 Written 1,231,213 1.5610 Short CFD 27/09/2005 Written 20,000 1.5663 Short CFD 28/09/2005 Written 504,166 1.5852 Short CFD 28/09/2005 Written 67,799 1.5724 Short CFD 29/09/2005 Written 929,230 1.5889 Short CFD 30/09/2005 Written 477,799 1.5708 Short CFD 03/10/2005 Written 212,732 1.5819 Short CFD 04/10/2005 Written 20,400 1.6185 Short CFD 04/10/2005 Written 23,106 1.6223 Short CFD 05/10/2005 Written 171,286 1.6583 Short CFD 06/10/2005 Written 279,143 1.6518 Short CFD 07/10/2005 Written 24,548 1.6277 Short CFD 07/10/2005 Written 30,500 1.6185 Short CFD 10/10/2005 Written 10,000 1.6000 Short CFD 11/10/2005 Written 10,000 1.6250 Short CFD 11/10/2005 Written 229,865 1.6321 Short CFD 12/10/2005 Written 30,000 1.6310 Short CFD 13/10/2005 Written 383,770 1.5726 Short CFD 13/10/2005 Written 59,081 1.5902 Short CFD 14/10/2005 Written 10,000 1.5802 Short CFD 17/10/2005 Written 11,542 1.5827 Short CFD 18/10/2005 Written 50,000 1.5809 Short CFD 19/10/2005 Written 126,582 1.5677 Short CFD 19/10/2005 Written 30,000 1.5383 Short CFD 19/10/2005 Written 66,290 1.5408 Short CFD 19/10/2005 Written 296,535 1.5330 Short CFD 19/10/2005 Written 95,000 1.5328 Short CFD 20/10/2005 Written 60,000 1.5388 Short CFD 20/10/2005 Written 664,822 1.5408 Short CFD 20/10/2005 Written 29,349 1.5334 Short CFD 21/10/2005 Written 865,168 1.5473 Short CFD 26/10/2005 Written 310,883 1.6167 Short CFD 27/10/2005 Written 42,736 1.6202 Short CFD 28/10/2005 Written 335,909 1.5852 Short CFD 31/10/2005 Written 2,000,000 2.0414 Short CFD 31/10/2005 Written 81,189 2.0371 Short CFD 31/10/2005 Written 308,196 2.0522 Short CFD 31/10/2005 Written 377,193 2.0405 Short CFD 02/11/2005 Written 250,000 1.9794 Short CFD 02/11/2005 Written 121,126 1.9801

Companies

Barclays (BARC)
UK 100