Exhibit 99.1

                    CLARIFICATIONS BY ENDESA WITH RESPECT TO
                       CERTAIN STATEMENTS OF GAS NATURAL

New York, 31 October 2005.--Gas  Natural,  in an attempt to prevent by any means
possible that the business  combination  resulting from its hostile tender offer
for ENDESA  (NYSE:ELE) be examined by the  appropriate  Regulator under European
and  Spanish  legislation,  has once again  made  statements  that could  create
confusion in market.

We would like to point out that as Gas Natural  plans to pay for a large portion
of ENDESA's stock with its own shares,  clarifications as to how the transaction
will be carried out and, more  importantly,  that the  appropriate  regulator is
assigned to study the resulting concentration and establish the conditions under
which it may,  or may not,  proceed  are  important  factors in  clarifying  the
expectations of the shareholders and achieving the greatest  possible  certainty
for the transaction.

Against this  backdrop,  Gas Natural is  demonstrating  a high level of anxiety,
caused  largely  by  evidence  of the  market's  rejection  of the bid,  and the
statement issued by La Caixa (the utility's controlling  shareholder) on October
13, expressing the bank's wish to distance itself from the transaction  launched
by its  affiliate,  even  denying,  against  all  evidence to the  contrary  and
repudiating  explanations made earlier to the market  regulators,  that the bank
exercises, or has ever exercised, control over Gas Natural.

In this regard,  we would the  highlight  considerable  and  convenient  lack of
knowledge  that Gas Natural  professes  in its  statements  regarding  the whole
transaction,  expressing  surprise that ENDESA has now  reclassified  Euro 1.5bn
issued as preferred shares as debt, impacting minorities interest,  when in fact
this information has been on file with the Spanish  regulator (CMNV) since April
5.



The same  applies to ENDESA's  reported  revenues  for 2004.  Gas Natural is now
"shocked"  that,  under  IFRS,  revenues  are Euro 4  billion  lower,  when this
information  is in the public  domain and has been since it was  reported to the
CMNV on April 5 2005.

It is also worth  mentioning  that ENDESA  reported  its first half  results for
2005, i.e.  months before the hostile bid was launched,  using the same criteria
for revenues  based on which it has reported to the EU the impact of the IFRS on
its 2004 financial statement.

In any case, given Gas Natural's repetitive use of confusing information, ENDESA
would like to make the following points clear:

European regulations on merger  concentrations state that it is most appropriate
to use  financial  information  for the full year  ended on the date  before the
tender offer was launched,  i.e.  September 4, for purposes of  calculating  the
appropriate  revenue figure.  As this is not possible,  European  regulations on
merger  concentrations  consider  that the next best  method  is,  under  normal
conditions,  to use  the  financial  statements  of the  previous  fiscal  year,
adjusted to reflect the Company's position at the date the tender offer is made.

If the financial  information  had been prepared the day before the tender offer
was launched, i.e. September 4 2005, the accounts would have been prepared using
IFRS, the  accounting  criteria valid at that date and the only criteria used by
listed Spanish companies,  including ENDESA, to report consolidated  figures for
2005.  First half results for 2005,  published  prior to the tender offer,  were
reported by ENDESA under IFRS.

ENDESA is obliged to present its 2004  financial  statements in accordance  with
IFRS.  Accordingly,  this  information  was  prepared and filed with the CNMV on
April 5 2005,  5 months  before  the  tender  offer was  launched,  and has been
available  on the  regulator's  web site since that date.  The  information  was



therefore in the public domain and could be accessed by any interested party. It
is therefore  surprising that Gas Natural did not become aware of this fact when
preparing  the tender  offer,  more so  considering  that the Group will have to
report  using the same  accounting  standards  in the  unlikely  event  that the
hostile bid has the results it expects.

Revenues under IFRS are over Euro 4 billion lower than under former Spanish GAAP
due to the application of the IFRS' principle of "substance over form".

This accounting  principle means that income generated by subsidiaries on behalf
of third  parties  which do not generate  value for the company can no longer be
booked  as  revenue.  Furthermore,   income  from  sales  made  to  the  Spanish
electricity market operator, OMEL, which overlap with purchases made by the same
group of companies in the same market,  time  interval and at the same price can
no longer be booked as revenues as to do so would  produce two streams of income
from the same energy  generated:  income from sales to the wholesale  market and
income from sales to the end customer.

ENDESA applied the adjustments  necessary to convert its financial  statement to
IFRS and  published  its 2004  financial  statements  under IFRS on April 5 2005
which were duly  registered  with the CNMV. An  explanation  of the  differences
between Spanish GAAP and IFRS were included in the  Registration  Document filed
with the CNMV on July 7 2005 and in the Form 20-F  filed with the SEC on June 30
2005 and are  reflected  in the  financial  statements  for the first and second
quarters of 2005 published by ENDESA under IFRS.  Furthermore,  these accounting
standards  in  accordance  with  IFRS have been  passed  on  externally  in four
separate reports issued by prestigious  accounting  experts in IFRS and auditing
firms.

Therefore,   adjustments  between  Spanish  GAAP  and  IFRS  have  been  applied
consistently  in ENDESA's  published  information,  and ENDESA has maintained an
extremely coherent position over time..



ENDESA has explained these  adjustments as differences  between Spanish GAAP and
IFRS in all its communications,  including the Form 20-F registered with the SEC
on June 30 2005.  However,  an explanation of the adjustments was never referred
to as a difference between Spanish accounting  principles and US GAAP.  Although
this in no way affects the information  submitted to the European Commission for
the purposes of calculating  turnover in accordance with Community regulation on
merger concentrations,  ENDESA wishes to state that it filed an amendment to the
Form 20-F filed with the SEC,  reflecting all  adjustments . This amendment does
not  result in any  change  to either  the net  profit or  shareholders'  equity
calculated  under US GAAP  nor  does it  affect  ENDESA's  financial  statements
prepared in  accordance  with Spanish GAAP or IFRS,  as filed with the CNMV on 5
April 2005, with the sole exception of an additional  insignificant reduction of
Euro 111 million in both  revenues and  operating  costs,  with no effect on the
results.

Current  European  regulations  governing  concentration   undertakings  require
certain adjustments to be made to the revenue figure to define the true economic
value of the companies involved in the transaction on the date it is effected.

ENDESA, in compliance with this legislation,  has made 6 adjustments (and not 30
as suggested  by Gas  Natural)  which do not modify  accounting  procedures  but
rather adjust the audited figures to reflect the European  Commission's criteria
for  merger  concentrations,   where  these  differ  from  effective  accounting
standards. The adjustments include:

The impact of changes in the  Group's  composition  between  the 2004  financial
statements  and date the tender  offer was  launched,  in order to  reflect  the
Group's updated structure as of the bid date.



Deduction of subsidies accounted for as income, but which are for the purpose of
promoting  activities  other than the company's core business,  in this case the
extraction of national coal.

Elimination of income  corresponding to previous fiscal years which had not been
registered due to the company's inability to quantify said amount  (compensation
related to non-Peninsular activity corresponding to 2001 - 2003).

Adding back revenues generated for the period but written off in accordance with
prudential accounting criteria (ENDESA Italia).

Deduction of taxes which,  although  booked as expenses,  are directly linked to
sales (public thoroughfare levies).

The following table quantifies the adjustments made:


- --------------------------------------------------------------------------------------------------------------
                                                                    Spain         Other         Total
                                                                                  EU            EU
- --------------------------------------------------------------------------------------------------------------
                                                                                       
1. Revenue adjustment to reflect company acquisitions and disposals (3)           564           561
2. Subsidy adjustments                                              (143)         -             (143)
3. Income from previous fiscal years                                (51)          -             (51)
4. Additional revenue generated at ENDESA Italia                    -             199           199
5. Deduction of discounts and taxes                                 (104)         -             (104)
6. Revenues from equity accounted investments                       171           104           275
TOTAL                                                               (130)         867           737
- --------------------------------------------------------------------------------------------------------------
Figures in millions of Euros



The figures  presented by ENDESA to the European  Commission  represent the sole
source of information for revenue calculation purposes in accordance with the



Commission's mergers  concentration  criteria and have been reviewed by external
auditors.

Spanish  revenues  calculated in accordance  with the  aforementioned  Community
criteria  for  merger  concentrations  account  for  64%  of  ENDESA's  revenues
generated  within the European  Community.  This figure  determines the European
dimension of the tender offer launched by Gas Natural for ENDESA.

In any event, ENDESA reserves the right to take appropriate legal action to hold
Gas  Natural  responsible  for any  liability  it may  incur as a result  of its
statements.










            For additional information please contact Alvaro Perez de
           Lema, North America Investor Relations Office, telephone #
                                  212 750 7200
                              http://www.endesa.es