Document:

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                                                                    Exhibit 10.4

                              UGI BORDEAUX HOLDING
                 Societe anonyme au capital de 85.568.435 euros
           Siege social: Immeubles Les Renardieres 3, place de Saverne
                                92400-Courbevoie
                            452 431 232 RCS Nanterre

AGZ HOLDING
Immeuble Les Renardieres
3 place de Saverne
92400 Courbevoie
France

CALYON (as Facility Agent on behalf of the Lenders)
Leverage and Financial Sponsors Group
9 quai du President Paul Doumer
92920 Courbevoie Cedex
France

Date: 7 Decemebr 2005

Dear Sirs,

SENIOR FACILITIES AGREEMENT DATED 7 DECEMBER 2005 BETWEEN AMONG OTHERS AGZ
HOLDING AS PARENT, THE COMPANIES NAMED THEREIN AS BORROWERS AND GUARANTORS,
CALYON AS MANDATED LEAD ARRANGER, FACILITY AGENT AND SECURITY AGENT AND THE
LENDERS NAMED THEREIN (AS AMENDED FROM TIME TO TIME, THE "FACILITIES AGREEMENT")

We refer to the Facilities Agreement.

Unless otherwise defined in this letter, words and expressions defined in the
Facilities Agreement have the same meaning when used in this letter.

This is the UGI Bordeaux Letter of Undertakings referred to in the Facilities
Agreement.

UGI Bordeaux undertakes to Calyon, acting for itself and as Facility Agent on
behalf of the Lenders, that it will fully comply with the terms of the Tax
Consolidation Agreement and, in particular, that it will pay and reallocate, on
the due date for payments as provided under the Tax Consolidation Agreement, the
tax savings that the Parent would have retained had the initial tax consolidated
group (with AGZ Holding as tax consolidated company) remained in place.

Such reallocation, which shall constitute an Equity Contribution, shall be in
the form of capital increase or subsidies or intercompany loans, at the option
of UGI Bordeaux.

UGI Bordeaux further undertakes that if such payments were made to the Parent in
the form of subsidies or intercompany loans, the rights of UGI Bordeaux to the
reimbursement of such subsidies or intercompany loans and to payment of interest
thereon (collectively the "SUBORDINATED DEBT") shall be fully subordinated to
the rights of the Finance Parties under the Senior Finance Documents.

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UGI Bordeaux as promettant and the Parent as stipulant agree to the benefit of
the Finance Parties represented by the Facility Agent (which hereby accepts on
behalf of the Finance Parties), that, until the date on which all sums due by
the Parent to the Finance Parties under the Senior Finance Documents (the
"SENIOR DEBT") have been fully discharged (the "SENIOR DISCHARGE DATE"), the
Senior Debt shall be paid or repaid prior to any sum due by the Parent to UGI
Bordeaux under the Subordinated Debt (for the avoidance of doubt, this will not
preclude the capitalisation of interest), unless otherwise agreed between UGI
Bordeaux, the Parent and the Facility Agent (acting on the instructions of the
Majority Lenders).

UGI Bordeaux hereby undertakes to immediately pay and transfer to the benefit of
the Agent on the behalf of the Finance Parties any sums which would have been
received by it, prior to the Senior Discharge Date, in breach of the provisions
of the preceding paragraph.

This letter constitutes a Senior Finance Document.

This letter shall be governed by and construed in accordance with French law and
Clause 30 (Governing law and submission to jurisdiction) of the Facilities
Agreement shall apply mutatis mutandis to this letter.

If you agree with the terms of this letter, please execute a copy thereof.

Yours faithfully,

UGI BORDEAUX HOLDING

/s/ F. Varagne
--------------------------------------
Name: F. Varagne
Title:
       -------------------------------

AGZ HOLDING

/s/ Francois Varagne
--------------------------------------
Name: Francois Varagne
Title: Directeur General Delegue

CALYON
FOR ITSELF AND AS FACILITY AGENT ON
BEHALF AND FOR THE ACCOUNT OF THE
LENDERS

/s/ Jacques Pochon et Jerome Del Ben
--------------------------------------
Name: Jacques Pochon et Jerome Del Ben

                                        2<PAGE>
                                                                    Exhibit 10.5

                           TAX CONSOLIDATION AGREEMENT
                                 AMENDMENT NO 1

                                     BETWEEN

                              UGI BORDEAUX HOLDING
                                       AND
                               ITS GROUP COMPANIES

BETWEEN THE UNDERSIGNED:

(1)  UGI BORDEAUX HOLDING, societe par action simplifiee with a share capital of
     EUR 85,568,435 having its registered office at Immeuble les Renardieres, 3
     place de Saverne, 92400 Courbevoie and registered under the number B. 452
     431 232 RCS Nanterre, duly represented for the purposes of the present
     Agreement by its President, Mr. Lon Greenberg,

                                (hereafter referred to as the "PARENT COMPANY"),

                                                                        firstly,

(2)  AGZ HOLDING, societe anonyme with a share capital of EUR 35,126,800 having
     its registered office at Immeuble les Renardieres, 3 place de Saverne,
     92400 Courbevoie and registered under the number 413 765 108 RCS Nanterre,
     duly represented for the purposes of the present Agreement by its President
     Mr. Lon Greenberg,

                                       (hereafter referred to as "AGZ HOLDING"),

                                                                       secondly,

(3)  ANTARGAZ, societe anonyme with a share capital of EUR 3,935,349 having its
     registered office at Immeuble les Renardieres, 3 place de Saverne, 92400
     Courbevoie and registered under the number B 572 126 043 RCS Nanterre, duly
     represented for the purposes of the present Agreement by Mr. Francois
     Varagne,

                                          (hereafter referred to as "ANTARGAZ"),

                                                                        thirdly,

(4)  WOGEGAL S.A., societe anonyme with a share capital of EUR 596,600.28 having
     its registered office at 19bis rue du Champ Martin, 35770 Vern Sur Seiche
     and registered under the number 310 095 658 RCS Rennes, duly represented
     for the purposes of the present Agreement by Mr. Alain Duprez,

                                      (hereafter referred to as "WOGEGAL S.A."),

                                                                       fourthly,

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(5)  GAZ EST DISTRIBUTION, societe anonyme with a share capital of EUR 152,400
     having its registered office at 109 boulevard d'Haussonville, 54000 Nancy
     and registered under the number 421 283 615 RCS Nancy, duly represented for
     the purposes of the present Agreement by Mr Augustin Sarragallet,

                              (hereafter referred to as "GAZ EST DISTRIBUTION"),

                                                                        fifthly,

(6)  NORD GPL SA, societe anonyme with a share capital of EUR 304,800 having its
     registered office at Le Marais d'Epinoy - Parc d'Activites du Chateau - Rue
     Gay Lussac, 62220 Carvin and registered under the number 422 265 504 RCS
     Bethune, duly represented for the purposes of the present Agreement by Mr
     Eric Jagerschmidt,

                                       (hereafter referred to as "NORD GPL SA"),

                                                                        sixthly,

(7)  RHONE MEDITERRANEE GAZ, societe anonyme with a share capital of EUR
     151,758.24 having its registered office at Centre d'activites du Chateau de
     l'Ile - 6 rue Leon Blum, 69320 Feyzin and registered under the number 382
     151 272 RCS Lyon, duly represented for the purposes of the present
     Agreement by Mr Georges Sciberras,

                            (hereafter referred to as "RHONE MEDITERRANEE GAZ"),

                                                                      seventhly,

AND

(8)  AQUITAINE PYRENEES GAZ, societe anonyme with a share capital of EUR
     135,163.56 having its registered office at 4 avenue de l'Escart, 33450
     Saint Loubes and registered under the number 410 963 770 RCS Bordeaux, duly
     represented for the purposes of the present Agreement by Mr. Alain Duprez,

                            (hereafter referred to as "AQUITAINE PYRENEES GAZ"),

                                                                       eighthly,

WHEREAS:

By way of a private written agreement, dated June 18, 2004, UGI Bordeaux
Holding, AGZ Holding, Antargaz, Wogegal, Gaz Est Distribution, Nord GPL, Rhone
Mediterranee Gaz and Aquitaine Pyrenees Gaz entered into an Agreement intituled
"Tax Consolidation Agreement between UGI Bordeaux Holding and its Group
Companies" (the "TAX CONSOLIDATION AGREEMENT").

Following the change of control of the Companies, it was decided by the
Extraordinary and Ordinary General Meeting of the AGZ Holding, Antargaz,
Wogegal, Gaz Est Distribution, Nord GPL, Rhone Mediterranee Gaz and Aquitaine
Pyrenees Gaz that were held on June 23, 24 and 25 2004 to modify the closing
date of the financial years of the Companies in order to fix this date on
September 30 of each year, commencing with the current financial year.

                                        2

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In view of the change of closing dates for the financial years of the
above-mentioned Companies, the parties have agreed to adopt the present
Amendment to proceed with the necessary amendments in respect of certain
provisions of the "Tax Consolidation Agreement".

All of the clauses of the Tax Consolidation Agreement apply, with the exception
of the Articles that are redefined or completed hereafter, the effect of which
is restricted to the scope of this Amendment.

THE PARTIES AGREE AS FOLLOWS:

Pursuant to this Amendment, the parties agree to fix the date of commencement of
the second financial year at October 1, 2004, then for the following financial
years on October 1 of each year.

Consequently,

1.   Article 2.2 of the Tax Consolidation Agreement is suppressed.

2.   Articles 3.1 and 3.2 are amended and redrafted as follows:

"3.1 For the 12-month period commencing April 1, 2004, AGZ Holding shall
     substitute itself for the other Consolidated Companies in respect of the
     payment of advances of Corporation tax and shall continue to pay, for the
     relevant period, the said sums in place of the said subsidiaries.

3.2  As of the financial year commencing October 1, 2004, and with the exception
     of the first two advances of the said financial year (advances of December
     15, 2004 and March 15, 2004), each Consolidated Company shall pay four
     advances to the Parent Company, calculated by the application of the rate
     in force, set forth at Article 360 of Annexe III of the French Tax Code, to
     the tax base defined in Article 3.3."

This Amendment comes into effect retrospectively on June 26, 2004.

All the other terms and conditions of the Tax Consolidation Agreement between
UGI Bordeaux Holding and its Group Companies, signed June 18, 2004, remain
unchanged.

                                        Executed in 8 originals
                                        In Courbevoie
                                        December 15, 2004

UGI BORDEAUX HOLDING
Represented by Mr. Lon Greenberg

AGZ HOLDING
Represented by Mr. Lon Greenberg

ANTARGAZ
Represented by Mr. Francois Varagne

                                        3

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WOGEGAL S.A.
Represented by Mr. Alain Duprez

GAZ EST DISTRIBUTION
Represented by Mr. Augustin Sarragallet

NORD GPL SA
Represented by Mr. Eric Jagerschmidt

RHONE MEDITERRANEE GAZ
Represented by Mr. Georges Sciberras

AQUITAINE PYRENEES GAZ
Represented by Mr. Alain Duprez

                                        4

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