Re: BARNES family in London UK
Am also researching the Barnes family and was therefore interested in your message.
I believe this is relevant to you:
HENRY GEORGE BARNES (aged 21) married
BLANCHE EMILY GWYTHER (aged 20) on 20/09/1891 at Holy Trinity, Bristol, Gloucester, England.Husband's Father listed at WILLIAM BARNES.Wife's Father listed as JAMES GWYTHER.FHL No. 1596361
BLANCHE EMILY GWYTHER was christened on 04/10/1871 at Saint Augustine The Less, Bristol, Gloucester.Father JAMES GWYTHER and Mother MARY ANN.FHL No. 1596312
I feel this makes sense and hope it is helpful to you.