Sorry, I see the 1881 details were posted by Carole W.
Very strange, if the right person, but George Ellen, the husband of Alice in 1881, seems to be on the subsequent censuses with different wives, and with Alice's son, Frederick, in 1891.
1871
Frederic Ellen Head - Male 33 1838 - London, Middlesex
Avis Ellen Wife - Female 30 1841 - London, Middlesex
George F Ellen Son - Male 12 1859 - London, Middlesex
Louisa Allsop Visitor - Female 9 1862 - Surrey
1891 - Hall Street, St Luke, Holborn
George Ellen Head Married Male 32 1859 Jeweller London, Middlesex
Charlotte Ellen Wife Married Female 31 1860 - London, Middlesex
Frederick Ellen Son - Male 10 1881 - London, Middlesex
1901 - 215, Essex Road, Islington,
George F Ellen Head Married Male 39 1862 Jeweller (Diamond Mounter) Bermondsey, Surrey
Emily A Ellen Wife Married Female 30 1871 - Hoxton, Middlesex
George H Ellen Son Single Male 4 1897 School Clerkenwell, Middlesex
Albert V Ellen Son Single Male 3 1898 - Clerkenwell, Middlesex
Emily W Ellen Daughter Single Female 1 1900 - Islington, Middlesex
Kate H Marshall Servant Single Female 23 1878 Servant (Domestic) Hackney, Middlesex
1911 -
https://www.familysearch.org/ark:/61903/1:1:XWGS-7RFAs yet, I can't find any further marriages for George