FORM 8-K

           SECURITIES AND EXCHANGE COMMISSION
                  Washington D.C. 20549

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

              For the Coupon Period ending
                  December 23, 2005

     Westpac Securitisation Management Pty Limited,
            in its capacity as trust manager
             of the Series 2005-1G WST Trust



New South Wales           333-32944        98-0181944
---------------           ---------        ----------
State of Incorporation    Commission File  IRS Employer No.
                          Number


 Level 25, 60 Martin Place, Sydney, NSW 2000, Australia
        (Address of principal executive offices)

      Registrant's telephone number

      +612 8254 3176


NOTEHOLDERS REPORT - SERIES 2005-1G WST TRUST

Date of Report - Determination Date  19-Dec-05

Housing Loan Collection Period       12-Sep-05  to  09-Dec-05
                                    (inclusive)     (inclusive)

Days in Collection Period            89

Coupon Period - Class A1             23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class A1     91


Coupon Period - Class A2             23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class A2     91


Coupon Period - Class B              23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class B      91

3 month BBSW at beginning of coupon period        5.61170%
3 Month USD-LIBOR              			  3.96000%

Foreign Exhcange Rate				  0.7740

Available Income                            27,708,693.13
Total Available Funds                       27,708,693.13
Accrued Interest Adjustment                 	     0.00
Redraws Made This Period                    59,931,030.59
Redraw Shortfall                                     0.00
Redraw Facility Draw                                 0.00
RFS Issued This Period                               0.00
Trust Expenses                               1,166,531.21
Total Payments                              23,910,665.32
Payment Shortfall                            	     0.00
Principal Draw This Period                   	     0.00
Total Principal Draws Outstanding                    0.00
Gross Principal Collections                195,645,703.20
Principal Collections			   135,714,672.61
Excess Available Income                      3,798,027.81
Excess Collections Distribution              3,798,027.81
Liquidity Shortfall                                  0.00
Liquidity Net Draw / (Repayment) this period         0.00
Remaining Liquidity Shortfall                        0.00
Liquidation Loss                                     0.00
Principal Charge Offs                                0.00
Prepayment Benefit Shortfall                         0.00
Average Daily Balance for Qtr            1,464,799,830.83
Subordinated Percentage                           1.7514%
Initial Subordinated Percentage                   3.3000%
Average Quarterly Percentage                      0.0000%

               Principal/100,000     Coupon/100,000
Class A1          7,064.0993	        799.4353  usd
Class A2	  7,064.0993	      1,125.3409 (per10,000)aud
Class B               0.0000          1,468.8896 (per10,000)aud

Stated Amount - AUD Equivalent       Percentage   Forex Percentage
Class A1     1,014,904,254.85	     72.52082%     1.00000
Class A2       357,061,769.67	     25.51414%
Class B         27,500,000.00         1.96504%
RFS                      0.00         0.00000%     0.00000
             1,399,466,024.52       100.00000%   100.00000%

Stated Amount - USD                  Bond Factor
Class A1       785,535,893.25        0.7141235
Class A2       276,365,809.73        0.7141235
Class B         21,285,000.00        1.0000000
RFS                      0.00         0.00
             1,083,186,702.98

Chargeoffs     0.00           Carryover ChargeOffs      0.00


                                $A

Scheduled principal        $  10,681,778
Unscheduled principal      $ 125,032,895
Principal Collections      $ 135,714,673




Fixed Interest Rate Housing Loan               $     9,478,522
Variable Rate Housing Loans                    $ 1,388,484,207
                                               $ 1,397,962,729


                    DELINQUENCY STATISTICS

                 Collection Period Ended:   11 December 2005

               Number     Current     Instalment   % by    % by
             of Loans
Current         9,270 	1,298,089,885 11,046,727  93.09%   92.86%
 1 - 29 Days      654      94,658,699 	 743,914   6.57%    6.77%
 30 - 59 Days      21	    3,180,676	  22,360   0.21%    0.23%
 60 - 89 Days       3         661,948      4,762   0.03%    0.05%
 90 - 119 Days      4	      673,994	   5,527   0.04%    0.05%
 120 - 149 Days     3         206,776      2,472   0.03%    0.01%
 150 - 179 Days     1         154,671 	   1,108   0.01%    0.01%
 180+ Days          2         336,080      2,363   0.02%    0.02%

  TOTAL         9,958   1,397,962,729 11,829,233 100.00%  100.00%


                       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, as Trust Manager for
the Series 2005-1G WST Trust, by the undersigned,
thereunto duly authorized.

                              Westpac Securitisation
                              Management Pty Limited, as
                              Trust Manager for the
                              Series 2005-1G WST
                              Trust,(Registrant)

Dated: 06 January 2006
By:    /s/ Ramesh Raghuraman

Name:    Ramesh Raghuraman

Title: Trust Manager
[{"type": "8-K", "sequence": "1", "filename": "wst05-1g1205.txt", "secsgml_size_bytes": 5879}]
{"company-data": {"conformed-name": "Westpac Securitisation Mgt Pty Ltd Series 2005-1G WST Trust", "cik": "0001315954", "assigned-sic": "6189", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-32944-01", "film-number": "06514293"}, "business-address": {"phone": "0116129226"}, "mail-address": {"street1": "MAYER BROWN & PLATT", "street2": "124 E MARCH STREET", "city": "CHICAGO", "state": "IL", "zip": "60603"}}
FORM 8-K

           SECURITIES AND EXCHANGE COMMISSION
                  Washington D.C. 20549

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

              For the Coupon Period ending
                  December 23, 2005

     Westpac Securitisation Management Pty Limited,
            in its capacity as trust manager
             of the Series 2005-1G WST Trust

New South Wales           333-32944        98-0181944
---------------           ---------        ----------
State of Incorporation    Commission File  IRS Employer No.
                          Number

 Level 25, 60 Martin Place, Sydney, NSW 2000, Australia
        (Address of principal executive offices)

      Registrant's telephone number

      +612 8254 3176

NOTEHOLDERS REPORT - SERIES 2005-1G WST TRUST

Date of Report - Determination Date  19-Dec-05

Housing Loan Collection Period       12-Sep-05  to  09-Dec-05
                                    (inclusive)     (inclusive)

Days in Collection Period            89

Coupon Period - Class A1             23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class A1     91

Coupon Period - Class A2             23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class A2     91

Coupon Period - Class B              23-Sep-05   to  23-Dec-05
                                     (inclusive)     (exclusive)

Days in Coupon Period - Class B      91

3 month BBSW at beginning of coupon period        5.61170%
3 Month USD-LIBOR              			  3.96000%

Foreign Exhcange Rate				  0.7740

Available Income                            27,708,693.13
Total Available Funds                       27,708,693.13
Accrued Interest Adjustment                 	     0.00
Redraws Made This Period                    59,931,030.59
Redraw Shortfall                                     0.00
Redraw Facility Draw                                 0.00
RFS Issued This Period                               0.00
Trust Expenses                               1,166,531.21
Total Payments                              23,910,665.32
Payment Shortfall                            	     0.00
Principal Draw This Period                   	     0.00
Total Principal Draws Outstanding                    0.00
Gross Principal Collections                195,645,703.20
Principal Collections			   135,714,672.61
Excess Available Income                      3,798,027.81
Excess Collections Distribution              3,798,027.81
Liquidity Shortfall                                  0.00
Liquidity Net Draw / (Repayment) this period         0.00
Remaining Liquidity Shortfall                        0.00
Liquidation Loss                                     0.00
Principal Charge Offs                                0.00
Prepayment Benefit Shortfall                         0.00
Average Daily Balance for Qtr            1,464,799,830.83
Subordinated Percentage                           1.7514%
Initial Subordinated Percentage                   3.3000%
Average Quarterly Percentage                      0.0000%

               Principal/100,000     Coupon/100,000
Class A1          7,064.0993	        799.4353  usd
Class A2	  7,064.0993	      1,125.3409 (per10,000)aud
Class B               0.0000          1,468.8896 (per10,000)aud

Stated Amount - AUD Equivalent       Percentage   Forex Percentage
Class A1     1,014,904,254.85	     72.52082%     1.00000
Class A2       357,061,769.67	     25.51414%
Class B         27,500,000.00         1.96504%
RFS                      0.00         0.00000%     0.00000
             1,399,466,024.52       100.00000%   100.00000%

Stated Amount - USD                  Bond Factor
Class A1       785,535,893.25        0.7141235
Class A2       276,365,809.73        0.7141235
Class B         21,285,000.00        1.0000000
RFS                      0.00         0.00
             1,083,186,702.98

Chargeoffs     0.00           Carryover ChargeOffs      0.00

                                $A

Scheduled principal        $  10,681,778
Unscheduled principal      $ 125,032,895
Principal Collections      $ 135,714,673

Fixed Interest Rate Housing Loan               $     9,478,522
Variable Rate Housing Loans                    $ 1,388,484,207
                                               $ 1,397,962,729

                    DELINQUENCY STATISTICS

                 Collection Period Ended:   11 December 2005

               Number     Current     Instalment   % by    % by
             of Loans
Current         9,270 	1,298,089,885 11,046,727  93.09%   92.86%
 1 - 29 Days      654      94,658,699 	 743,914   6.57%    6.77%
 30 - 59 Days      21	    3,180,676	  22,360   0.21%    0.23%
 60 - 89 Days       3         661,948      4,762   0.03%    0.05%
 90 - 119 Days      4	      673,994	   5,527   0.04%    0.05%
 120 - 149 Days     3         206,776      2,472   0.03%    0.01%
 150 - 179 Days     1         154,671 	   1,108   0.01%    0.01%
 180+ Days          2         336,080      2,363   0.02%    0.02%

  TOTAL         9,958   1,397,962,729 11,829,233 100.00%  100.00%

                       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, as Trust Manager for
the Series 2005-1G WST Trust, by the undersigned,
thereunto duly authorized.

                              Westpac Securitisation
                              Management Pty Limited, as
                              Trust Manager for the
                              Series 2005-1G WST
                              Trust,(Registrant)

Dated: 06 January 2006
By:    /s/ Ramesh Raghuraman

Name:    Ramesh Raghuraman

Title: Trust Manager