A Union Bank of Australia Ltd 1905 Five Pound note, circulated but still in good condition, might fetch anything up to £110,000 AUD at best. Do not expect "best".
A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1955 One Pound note (Coombs/Wilson)(depending on the serial number), uncirculated and in absolute mint condition could fetch anything up to $425 AUD. If it has been circulated but still in good condition, it might fetch anything from $20 to $170 AUD.
A reputable coin dealer will be able to give a more accurate valuation.
Australia did not have its own currency in 1907. The Australian Five Pound note was first issued in 1914. The Australian Five Dollar note was first issued in 1967.
There was King George V and King George VI. To get an estimate of value on an Australian predecimal banknote, you will need to provide the two signatories on the note and the serial number.
There was no Australian Dollar until 1966, long after the "early settlement". At the time of currency changeover from Pounds to Dollars, the Australian One Pound note converted to the Australian Two Dollar note.
Australia has never produced a Twenty-Five Pound note.
Twenty Australian dollars
The Australian Twenty Pound note was only issued in 1913 and 1918. An Australian 1918 Twenty Pound note (Cerutty/Collins), uncirculated and in absolute mint condition could fetch up to $495,000 AUD. If it has been circulated, but still in good condition, it might fetch anything from $47,500 up to $295,000 AUD. There were 421,500 printed. A reputable coin dealer will be able to give a more accurate valuation.
The Bank of England One Pound note was demonetised in 1988.
One Pound (Australian) in 1919 had the purchasing power of about $52.68 AUD today. NOTE - This historical conversion is the result of many calculations and considerations for which I cannot take credit. The resulting answer should only be regarded as an approximation.
The Value of a misprinted one pound note there is no real value it depends what dealers etc will pay for it I would reckon about £20
two austalian dollars
The Australian Twenty Pound note was only ever printed in 1913 and 1918, and the notes circulated from 1914 to 1938. Depending on the signatories, an uncirculated note might fetch anything up to $495,000 AUD. A circulated note in good condition might fetch anything from $47,500 to 295,000 AUD. A reputable coin dealer will be able to give a more accurate valuation.
The last British One Pound note was issued in 1984. The One Pound note ceased to be Legal Tender in 1988.