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



                               28 September, 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 Infonet Germany announcement made on
                28 September 2005



                                                              September 28, 2005

                        BT TO ACQUIRE INFONET DEUTSCHLAND


BT announced today it has signed a definitive agreement to acquire Infonet
Network Services Deutschland GmbH (Infonet Deutschland). This follows BT's
acquisition of California-based Infonet Services Corporation, one of the world's
leading providers of international managed voice and data network services, in
February, 2005. BT currently owns 18% of Infonet Deutschland and will acquire
the remaining 82% from T-Systems, a subsidiary of Deutsche Telekom AG.

Infonet Deutschland provides more than 200 major corporate and public sector
organisations with integrated network solutions such as IP-based Virtual Private
Networks (VPN), Internet connectivity and Remote Access Services and employs 61
staff.

Jan Geldmacher, CEO of BT Germany, said: "This acquisition is a perfect fit as
we are further broadening our footprint in the German market. Infonet is known
for its strength in product quality and customer service and this transaction
will complement BT's strengths in the market for networked IT services."

Micheline Wens, General Manager of Infonet Deutschland, said: "We are proud to
join BT. This is great news for our customers, who will continue to receive the
same high-quality service that they are accustomed to. By combining our
strengths with BT's capabilities, we'll be able to provide our customers with an
even more complete portfolio of innovative services."

Infonet's management team, led by Micheline Wens, 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. Wens will be member of the Country
Executive Team of BT Germany. Completion of the transaction, which is
conditional upon regulatory approvals, is expected within two months. For the
period to 31 December 2004 the gross assets of the company had a value of 
EUR 19.2m.

Notes to Editors

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

In the year ended 31 March 2005, BT Group's turnover was GBP18,623 million with
profit before goodwill amortization, exceptional items and taxation of GBP2,085
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 Infonet Deutschland

Infonet Network Services Deutschland GmbH was founded in 1988 in Frankfurt. Its
60 employees support over 400 multinational and national customers, and offer
them the technical and organisational infrastructure for global communication
services. T-Systems is with 82 % majority shareholder of the GmbH. British
Telecommunications plc, London, owns the remaining shares. Further information
available under: www.infonet.de

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: 28 September, 2005