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As your father was born in Norfolk, what is it you have that links the family to Newcastle?
Not knowing if Alice's birth surname was Orange, or if perhaps she had married someone called Orange makes it difficult :-)
Working first on it being her birth surname:
A free Advanced Search of the 1921 register for Alice Orange brings up a possible born 1907, in Ryton Co. Durham (just over the river from Newcastle) and she was living in Newcastle. Hovering over the image icon shows me that there was a Magdalene S and a Susannah in the same household.
Back to the search and I looked for Magdalene S (no surname specified) living in Newcastle and specified another person in the household as Alice Orange
I repeated that for Susannah
and got Magdalene S Moore, born 1872, Newcastle and Susannah Moore, born 1874, Newcastle
Checking on the GRO births register, this girl's birth was registered in Gateshead District in Q4 1907 and the mother's maiden name is down as '-', which indicates she was illegitimate.
This looks likely to be the above Alice in the 1911 census which shows her as the adopted daughter of Magdalen Stokoe Moore
https://www.familysearch.org/ark:/61903/1:1:XWM8-RZN(you need to be signed in to a free account on Family Search to see that transcript)
You should be able to search on Ancestry in the 1939 register in Newcastle (not on Family Search and we aren't allowed to do look ups).
No idea if this was 'your' Alice but IF Orange was her birth name then it should give you some idea of how to go about looking for other 'possibles'
Boo