FORM 6-K


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                            Report of Foreign Issuer


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


                                October 31, 2005


                            BRITISH ENERGY GROUP PLC
                               (Registrant's name)


                                  Systems House
                                   Alba Campus
                                   Livingston
                                    EH54 7EG
                    (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): 



                                 Exhibit Index

The following document (bearing the exhibit number listed below) is furnished
herewith and is made a part of this Report pursuant to the General Instructions
for Form 6-K:

Exhibit       Description

No. 1        RNS Announcement, re: Boiler Closure Units Update 
             dated 31 October, 2005

31 October 2005




British Energy Group PLC



Update on issues related to Boiler Closure Units at Heysham 1 and Hartlepool

Two units at Heysham 1 have now returned to service. The Company is continuing a
programme of work on two units at Hartlepool and now expects them to return to
service in mid November. The net additional unplanned losses related to these
outages is expected to increase by 1 TWh to around 2.5 TWh.


Contacts:


John Searles            British Energy, Investor Relations         01506 408 715
Andrew Dowler           Financial Dynamics, Media                  020 7831 3113






Website:  www.british-energy.com




                                   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.


Date:  October 31, 2005                    BRITISH ENERGY GROUP PLC

                                           By:____John Searles____

                                           Name:  John Searles
                                           Title: Director - Investor Relations