Like everyone else I'm having trouble locating Elizabeth Jones/Collingbourne/Skinner/McIntyre after 1851 census and her 1858 & 1863 marriages
Elizabeth's signature slightly different on each m/c but as you mention her father's name & occ are the same
Tried starting again with the 1841 census and working through to see if anything came to light
1841 census Limehouse Piece: 701 Folio: 29 Page 8
George Collingbourne 38
occ milk manHarriet 34
George 15
John 11
Harriett 7
Richard 5
ELIZABETH 3Alfred 6 Mo
Elizabeth JONES
mn SHERRATT1838 J Quarter in STEPNEY Volume 02 Page 370
Have they made a mistake with the mn of the later Collingbourne children
Alfred COLLINGBOURNE
mn JONES1840 D Quarter in STEPNEY Volume 02 Page 427
1851 census Piece: 1554 Folio: 219 Page 4
Geo Collingbourne 47 Badgeworth Gloucester
occ milkmanHarriet 40
Rosina 7 Limehouse
Caroline 4 Limehouse
Alfred 2 Limehouse
Rosina Rebecca COLLINGBOURNE
mn JONES1844 M Quarter in STEPNEY Volume 02 Page 487
Rosina Rebecca Collingbourne married Edward RUST in 1864
her father George noted as deceased
her sister
Caroline Collingbourne was one of the witnesses
Caroline Collingbourne born 26th Jan 1846
Baptism 15 Feb 1846 Limehouse St Anne, Tower Hamlets
Father:
George occ
milkman Mother:
Harriet abode Limehouse
Caroline COLLINGBOURNE
mn JONES1846 M Quarter in STEPNEY Volume 02 Page 504
Caroline Collingbourne married age 27 on 30 Dec 1873 William Stevens
Her father George
occ cow keeperWitnesses were
Alfred COLLINGBOURNE &
Harriet JONESAlfred Collingbourne born 9th June 1849
Baptism 1 Jul 1849 Limehouse St Anne, Tower Hamlets
Father:
George occ
milkman Mother: Harriet abode Limehouse
Alfred appears to have a different mn altogether on GRO indexes

Alfred COLLINGBOURNE
mn GEORGE1849 J Quarter in STEPNEY Volume 02 Page 499
Have you checked to see if Elizabeth Jones/Collingbourne/Skinner/McIntyre born c1838 travelled aboard her married sister Rosina appears to have died in Australia
Rosina Rebecca RUST Age: 61 died 29 Nov 1905 Adelaide
Page Number: 12 Volume Number: 314
Edward RUST Age: 62 Died 02 Dec 1905 Adelaide
Page Number: 13 Volume Number: 314
https://www.findagrave.com/memorial/162430845Could Elizabeth Collingbourne/Skinner/McIntyre be using her JONES surname?
Elizabeth JONES 33 (1838) London, Unm
Relation: Servant - housemaid
Civil Parish: St George in the East
1871c Piece 539 Folio: 52 Page Number: 8