The whole scenario of Henry Herbert Morris' (Harry) parents is somewhat bizarre.
From what I can see, his father was indeed Henry William Mayfield Morris who married Sarah Jane Hayward in 1882 - 2 sons Samuel Frederick Mayfield Morris b.1884 Marylebone and Henry Ernest Percy Morris b.1886 Marylebone. The 1891/1901 census states 'Henry H' was born Marylebone (not in Wales). I think that Henry Herbert Morris was actually the son born Henry Ernest Percy who was born 23/3/1886, bp.11/4/1886 St. Marys, St. Marylebone and wife Sarah. Note his birthdate - same day, month, as Henry Herbert Morris' birthdate but one year out!
'Mildred' Rogers was actually Emma Rebecca Amelia Rogers b.1861 who married an Alexander Lucas Blandford in 1879 Lambeth - they had the following children:
Maud Alexandra Ethel b.1880
Beatrice Grace Lilian b.1881
Dora Helena Louisa b.1885
These children are with Henry and Emma in 1891 but listed as Morris not Blandford.
So, it would appear that Henry and Emma got together between 1886 and 1888 as after then childrens births show as Morris, mmn Rogers i.e. Gertrude Emma May b.1889, George Frederick Douglas b.1891 and Ernest Percy Malcolm b.1893.
There is no trace of a marriage between Henry W M Morris and Emma R A Blandford, nee Rogers.
Other than the birth entry for Henry Ernest Percy Morris b.23/3/1886 there is no further trace of anyone in this name and from the birthdate given when 'Henry Herbert' died in 1915 i.e. b.23/3/1885 London I believe these 2 are one and the same person (albeit birth year one year out) but can't explain why his second name from 'Ernest Percy' to 'Herbert'. However, his older brother Samuel Frederick Mayfield Morris was born 27/6/1884 but married as Frederick Samuel Mayfield Morris to an Edith Jeanette Coles on 10/12/1910 Finsbury Park, London. They moved to Essex where Samuel died in1953 Southend on Sea (as Samuel F M Morris). It's possible their mother Sarah Jane died Mar.1888 Islington (bc.1856) - if so, there was no reason why HWM couldn't marry Emma (unless, of course, her husband Alexander Lucas Blandford was still alive). I can't find Samuel F M Morris on 1891 or 1901 census so don't know where he was raised but in 1911 he's listed as Frederick (the name he married under).
So, a) Henry Herbert's mother wasn't a Winifred Rogers, but his 'step-mother' was an Emma Rebecca Amelia Rogers b) Henry Herbert was actually born as Henry Ernest Percy on 23/3/1886 (not 1885) to Henry William Mayfield Morris and 1st wife Sarah Jane Hayward (possibly died 1888).
What a conundrum!
Annette