SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    Form 6-K

                            Report of Foreign Issuer

                      Pursuant to Rule 13a-16 or 15d-16 of
                       the Securities Exchange Act of 1934


                     for the period ended 18 September 2006


                                    BP p.l.c.
                 (Translation of registrant's name into English)


                 1 ST JAMES'S SQUARE, LONDON, SW1Y 4PD, ENGLAND
                    (Address of principal executive offices)


     Indicate  by check mark  whether the  registrant  files or will file annual
     reports under cover Form 20-F or Form 40-F.


              Form 20-F        |X|          Form 40-F
                         ---------------               ----------------


     Indicate by check mark whether the registrant by furnishing the information
     contained in this Form is also thereby  furnishing  the  information to the
     Commission  pursuant to Rule 12g3-2(b) under the Securities Exchange Act of
     1934.


                    Yes                            No        |X|
                         ---------------               ----------------




                    BP SAYS THAT REPAIR OF SUBSEA EQUIPMENT
                      WILL DELAY THUNDER HORSE UNTIL 2008

Following a series of tests carried out over the past four months that revealed
metallurgical failure in components of the subsea system, BP announced today
that it plans to retrieve and rebuild all the sea-bed production equipment from
its Thunder Horse field in the deepwater Gulf of Mexico.

BP said the problem became evident when it conducted pre-commissioning tests by
pumping water through the system to establish system integrity. The equipment
passed all the normal industry standard tests and regulatory requirements. But
when the company carried out more prolonged and rigorous testing, as an
additional safety precaution, a failure occurred on a subsea weld.

As a consequence of the failure, BP said it had decided to retrieve both the
damaged sea-bed manifold and a second manifold for further examination and
onshore testing. The second manifold displayed a similar failure during testing
last week.

In view of these failures, BP today said it would now retrieve and replace all
the subsea components it believes could be at risk. This work will be done over
the course of the next year and the company said it does not expect production
from Thunder Horse to begin before the middle of 2008.

It said it was too early to estimate the additional costs involved in replacing
the affected systems.


Notes to Editors:

-    The Thunder Horse field was discovered in 1999. It is designed to use the
     largest production drilling quarters semi-submersible platform in the
     world.

-    The platform weighs more than 50,000 tons and will produce from water
     depths of about 6,000 feet, from some of the highest temperature and
     highest pressure wells in the Gulf of Mexico.

-    The facility is designed to process 250,000 barrels of oil a day and 200
     million standard cubic feet per day.

-    Oil and gas will be transported to existing shelf and onshore
     interconnections via the Mardi Gras transportation system.

-    BP operates the development (75 per cent interest), with co-venturer
     ExxonMobil owning the balance.

-    BP began deepwater Gulf of Mexico operations in the mid-1980s.  BP now
     produces about 270,000 barrels of oil equivalent per day from nearly two
     dozen fields, including BP-operated facilities at Pompano, Marlin, Horn
     Mountain and Na Kika.


Further information:

BP Press Office, London, tel: +44 (0)20 7496 4076

BP Press Office, Houston, tel: +1 281 366 5174


                                    - ENDS -




                                   SIGNATURES



Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.



                                         BP p.l.c.
                                        (Registrant)



Dated: 18 September 2006                      /s/ D. J. PEARL
                                                  ..............................
                                                  D. J. PEARL
                                                  Deputy Company Secretary