##### 



Exhibit 2(b).1.3
 SUPPLEMENTARY PROSPECTUS DATED 17 NOVEMBER 2005
 
 National Grid plc
 (incorporated with limited liability in England and Wales on 11 July 2000 under registered
number 4031152)
 National Grid Electricity Transmission plc
 (incorporated with limited liability in England and Wales on 1 April 1989 under registered
number 2366977)
 Euro 6,000,000,000
 Euro Medium Term Note Programme
 Supplement Prospectus National Grid NGET Issuer Issuers FSMA NGET Supplement Programme




---



##### 



Amendment to the Terms and Conditions
  (i)
    
    The deletion of the previous definitions of Index and Index Figure, Index
Ratio, Limited Index Ratio and Limited Indexation Factor and the addition of each of
the following paragraphs as new definitions in substitution therefor in Condition 4.1:Index or Index Figure means, subject as provided in Condition 4.3(i), the UK Retail
Price Index (RPI) (for all items) published by the Office for National Statistics
(January 1987 = 100) or any comparable index which may replace the UK Retail Price Index
for the purpose of calculating the amount payable on repayment of the Reference Gilt. Any
reference to the Index Figure which is specified in the relevant Final Terms as:
 (i)
    
    applicable to a particular month, shall, subject as provided in
Conditions 4.3 and 4.5, be construed as a reference to the Index Figure published in
the seventh month prior to that particular month and relating to the month before
that of publication; or(ii)
    
    applicable to the first calendar day of any month shall, subject as
provided in Conditions 4.3 and 4.5, be construed as a reference to the Index Figure
published in the second month prior to that particular month and relating to the
month before that of publication; or(iii)
    
    applicable to any other day in any month shall, subject as provided in
Conditions 4.3 and 4.5, be calculated by linear interpolation between (x) the Index
Figure applicable to the first calendar day of the month in which the day falls,
calculated as specified in sub-paragraph (ii) above and (y) the Index Figure
applicable to the first calendar day of the month following, calculated as specified
in sub-paragraph (ii) above and rounded to the nearest fifth decimal place.
 If the Index is replaced, the Issuer will describe the replacement Index in a supplement
to the Prospectus;Index Ratio applicable to any month or date, as the case may be, means the Index Figure
applicable to such month or date, as the case may be, divided by the Base Index Figure
and rounded to the nearest fifth decimal place;Limited Index Ratio means (a) in respect of any month or date, as the case may be,
prior to the relevant Issue Date, the Index Ratio for that month or date, as the case may
be, (b) in respect of any Limited Indexation Date after the relevant Issue Date, the
product of the Limited Indexation Factor for that month or date, as the case may be, and
the Limited Index Ratio as previously calculated in respect of the month or date, as the
case may be, twelve months prior thereto; and (c) in respect of any other month, the
Limited Index Ratio as previously calculated in respect of the most recent Limited
Indexation Month;Limited Indexation Factor means, in respect of a Limited Indexation Month or Limited
Indexation Date, as the case may be, the ratio of the Index Figure applicable to that
month or date, as the case may be, divided by the Index Figure applicable to the month or
date, as the case may be, twelve months prior thereto, provided that (a) if such ratio is
greater than the Maximum Indexation Factor specified in the relevant Final Terms, it
shall be deemed to be equal to such Maximum Indexation Factor and (b) if such ratio is
less than the Minimum Indexation Factor specified in the relevant Final Terms, it shall
be deemed to be equal to such Minimum Indexation Factor;(ii)
    
    The addition of the following paragraph as a new definition in Condition 4.1:




---



##### 



Limited Indexation Date means any date falling during the period specified in the
relevant Final Terms for which a Limited Indexation Factor is to be calculated;(iii)
    
    The deletion of the previous Condition 4.2 and the addition of the following
paragraph as a new Condition 4.2:
 4.2
    
    Application of the Index RatioEach payment of interest and principal in respect of the Instruments shall be the
amount provided in, or determined in accordance with, these Conditions, multiplied
by the Index Ratio or Limited Index Ratio in the case of Limited Index Linked
Instruments applicable to the month or date, as the case may be, on which such
payment falls to be made and rounded in accordance with Condition 3.2.4(e).
 (iv)
    
    The deletion of the previous Condition 4.3 and the addition of the following
paragraph as a new Condition 4.3:
 4.3
    
    Changes in Circumstances Affecting the Index
 (i)
    
    Change in base: If at any time and from time to time the
Index is changed by the substitution of a new base therefor, then with effect
from the month from and including that in which such substitution takes effect
or the first date from and including that on which such substitution takes
effect, as the case may be, (1) the definition of Index and Index Figure
in Condition 4.1 shall be deemed to refer to the new date or month in
substitution for January 1987 (or, as the case may be, to such other date or
month as may have been substituted therefor), and (2) the new Base Index
Figure shall be the product of the existing Base Index Figure and the Index
Figure for the date on which such substitution takes effect, divided by the
Index Figure for the date immediately preceding the date on which such
substitution takes effect.(ii)
    
    Delay in publication of Index if sub-paragraph (i) of the
definition of Index Figure is applicable: If the Index Figure which is
normally published in the seventh month and which relates to the eighth month
(the relevant month) before the month in which a payment is due to be made
is not published on or before the fourteenth business day before the date on
which such payment is due (the date for payment), the Index Figure
applicable to the month in which the date for payment falls shall be (1) such
substitute index figure (if any) as the Trustee considers to have been
published by the Bank of England for the purposes of indexation of payments on
the Reference Gilt or, failing such publication, on any one or more issues of
index-linked Treasury Stock selected by an Indexation Adviser (and approved by
the Trustee) or (2) if no such determination is made by such Indexation
Adviser within seven days, the Index Figure last published (or, if later, the
substitute index figure last determined pursuant to Condition 4.3(i)) before
the date for payment.(iii)
    
    Delay in publication of Index if sub-paragraph (ii) and/or
(iii) of the definition of Index Figure is applicable: If the Index Figure
relating to any month (the calculation month) which is required to be taken
into account for the purposes of the determination of the Index Figure for any
date is not published on or before the fourteenth business day before the date
on which such payment is due (the date for payment), the Index Figure
applicable for the relevant calculation month shall be (1) such substitute
index figure (if any) as the Trustee considers to have been published by the
Bank of England for the purposes of indexation of payments on the Reference
Gilt or, failing such publication, on any one or more issues of index-linked
Treasury Stock selected by an Indexation Adviser (and approved by the Trustee)
or (2) if no such determination is made by such Indexation Adviser within
seven days,




---



##### 



the Index Figure last published (or, if later, the substitute index figure
last determined pursuant to Condition 4.3(i)) before the date for payment.
 (v)
    
    The deletion of the previous Condition 4.4 and the addition of the following
paragraph as a new Condition 4.4:
 4.4
    
    Application of ChangesWhere the provisions of Condition 4.3(ii) or Condition 4.3 (iii) apply, the
determination of the Indexation Adviser as to the Index Figure applicable to the
month in which the date for payment falls or the date for payment, as the case may
be, shall be conclusive and binding. If, an Index Figure having been applied
pursuant to Condition 4.3(ii)(2) or Condition 4.3(iii)(2), the Index Figure
relating to the relevant month or relevant calculation month, as the case may be,
is subsequently published while an Instrument is still outstanding, then:
 (i)
    
    in relation to a payment of principal or interest in respect
of such Instrument other than upon final redemption of such Instrument, the
principal or interest (as the case may be) next payable after the date of such
subsequent publication shall be increased or reduced, as the case may be, by
an amount equal to the shortfall or excess, as the case may be, of the amount
of the relevant payment made on the basis of the Index Figure applicable by
virtue of Condition 4.3(ii)(2) or Condition 4.3(iii)(2) below or above the
amount of the relevant payment that would have been due if the Index Figure
subsequently published had been published on or before the fourteenth business
day before the date for payment; and(ii)
    
    in relation to a payment of principal or interest upon final
redemption, no subsequent adjustment to amounts paid will be made.
 Amendment to the Form of Final Terms
 (i)
    
    The reference to Limited Indexation Month(s): in paragraph 18(xii) in Part A of the
Form of Final Terms shall be replaced with Limited Indexation Month(s) or Period for
calculation of Limited Indexation Factor:.(ii)
    
    A new paragraph 18(xv) shall be inserted as follows:
 (xv) Index or Index
Figure (Condition 4.1):
    
    Sub-paragraph [(i)/(ii)/(iii)] of
the definition of Index or Index
Figure as set out in Condition 4.1
shall apply
 Unaudited consolidated financial statements of National Grid as at, and for the six
months ended, 30 September 2005
 http://www.londonstockexchange.com/en-gb/pricesnews/marketnews/