SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 6-K

                        Report of Foreign Private Issuer


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



                                25 February, 2005


                                  BT Group plc
                 (Translation of registrant's name into English)


           BT Centre
           81 Newgate Street
           London
           EC1A 7AJ
           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..


If "Yes" is marked, indicate below the file number assigned to the 
registrant in connection with Rule 12g3-2(b): 82- ________ 



Enclosures:  1.  Acquisition announcement made on 25 February, 2005


February 25, 2005

                      BT COMPLETES ACQUISITION OF INFONET

BT today  announced the  completion of the  acquisition  of Infonet,  one of the
world's leading  providers of global managed voice and data network services for
corporate  customers.  All  conditions  to the  transaction  have now been  met,
following formal approval of Infonet's stockholders at a general meeting held on
February 23.

BT and  Infonet  announced  on 8 November  2004 an  agreement  for BT to acquire
Infonet for $2.06 per share,  valuing  Infonet at $965m  (GBP510m)  inclusive of
Infonet's  cash balance of $390m  (GBP205m)  (1), or $575m  (GBP305m) net of the
cash balance.

Infonet,  which will be renamed BT Infonet,  becomes part of BT Global Services.
BT is confident it will achieve the synergy  benefits  initially  announced,  of
$150m per annum by the third year after  completion,  in a way which will ensure
service quality is maintained.  BT Infonet's experienced management team, led by
its chief  executive,  Jose A.  Collazo,  will  remain  in place to  manage  the
business, maintain continuity for customers and assist in the integration of the
two customer bases and product sets.

Andy Green,  CEO BT Global  Services,  said: "I am very proud to welcome a great
team of highly skilled  professionals  into the BT family. The combination of BT
Global  Services  and Infonet  will create a clear  leader in the  networked  IT
services  market,  and will  enhance our  position as the supplier of choice for
multi-site  organisations  around the world. With the help of our new BT Infonet
colleagues,  BT Global  Services  will  continue our drive to help our customers
address the challenges and opportunities of the digital networked economy."

Jose A. Collazo,  chief executive of BT Infonet,  said: "We are about to begin a
new era as part of BT, bringing significant  opportunities for our customers and
employees.  BT  Infonet  brings  market-leading  skills  in  network  management
services,  a brand  identified  with  customer  service  excellence,  a suite of
services  tailored  to the  needs of a  continually  globalizing  world,  global
presence and reach around the world, and a stable entrepreneurial  organization.
It also brings a customer base of leading  multinational  organisations  such as
Volkswagen, Nestle, Bayer, IBM, DHL and Solvay. As a part of BT Global Services,
we will  remain  focused  on the same  goal:  to be the  partner  of choice  for
multinationals  when it  comes  to  launching  and  servicing  mission  critical
applications."

Infonet's  stock  has  today  ceased  trading  on the New York  Stock  Exchange.
EquiServe  has  been  retained  by BT to  serve  as  paying  agent.  As  soon as
practicable,  the paying agent will mail a letter of  transmittal to each person
who was a holder of stock at the  effective  time of the  merger.  The letter of
transmittal  will  contain  instructions  for use in  surrendering  certificates
formerly  representing  shares of Infonet common stock in exchange for $2.06 per
share in cash.


About BT

BT is one of the world's leading providers of  communications  solutions serving
customers in Europe,  the Americas and Asia Pacific.  Its  principal  activities
include  IT  and  networking   services,   local,   national  and  international
telecommunications  services,  and higher-value  broadband and internet products
and services.

BT consists principally of three lines of business:

-    BT Retail,  providing a comprehensive  range of communications  and related
     services to over 20m UK consumers and businesses.

-    BT Wholesale,  providing  network  services and solutions  within the UK to
     more than 600 fixed and mobile  operators and service  providers  including
     the provision of broadband and private circuits.

-    BT Global Services,  providing IT and networking services to meet the needs
     of multi-site  organisations  globally. BT Global Services operates in more
     than 130 countries and also offers international carrier services.

In the year ended 31 March 2004, BT Group's turnover was GBP18,519  million with
profit before goodwill amortisation,  exceptional items and taxation of GBP2,013
million.

BT Group plc is  listed  on stock  exchanges  in  London  and New York.  British
Telecommunications  plc  (BT)  is a  wholly-owned  subsidiary  of BT  Group  and
encompasses virtually all businesses and assets of the BT Group.

For more information, visit www.bt.com/aboutbt

About BT Infonet

BT Infonet is a leading provider of managed network communications  services for
multinational entities,  fully owned by BT Group and part of BT Global Services.
BT Infonet  offers  integrated  solutions  optimizing  the complex  relationship
between  enterprise  applications  and the global network.  BT Infonet  provides
local service  support in over 70 countries and  territories  and its network is
accessible from more than 180 countries


Notice

This   release  may  include   statements   that   constitute   "forward-looking
statements",  including with regard to the Infonet acquisition. These statements
are made  pursuant to the safe  harbour  provisions  of the  private  Securities
Litigation Reform Act of 1995. Because such statements  inherently involve risks
and  uncertainties,  actual  future  results  may differ  materially  from those
expressed or implied by such forward-looking statements.  Neither BT nor Infonet
undertakes any  obligation to up-date these  statements for revisions or changes
after the date of this release.

(1) As at 31 March, 2004


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.


BT Group PLC
(Registrant)  
 

By: /s/ Patricia Day
--------------------
Patricia Day, Assistant Secretary. Head of Shareholder Services
 

Date 25 February, 2005