By 1871 it looks as if the family are split up as Charles and Ellen are listed as paupers in the Workhouse in Headington Oxfordshire.
George is a farm servant, lodging in Marston.
I cant see Richard, so that would fit with him emigrating in 1864.
Been quiet for a few days confirming information at the NZ End.
)I have searched the FreeBDM records and found a death record for a Mary Andrews Mar 1862 3a/367 at Headington and presume this will be the Mary Andrews 1 shown in Isaacs family in the 1861 Census Record
)I also found a record recording a Marriage of a Jane Andrews to Hubert Martin in Sept 1875 at Oxford 3a/892 this could potentially be Isaac's daughter Jane Andrews 9 from the 1861 census.
)If Charles and Ellen were in a workhouse in Headington, would they have eventually been released or discharged from the workhouse? I presume if I continue to search the freeBDM I may pick them up. I also note a few records may be online and one may need to know the 'Poor Law Union' responsible for the workhouse is there a register of these?