An attempted summary.
The marriage of Henry who married Hannah states he was the son of Henry Loader. ( therefore this cannot be Charles Loader and Annie Allen.)
Harry Loader born in 1878, birth registered in Kensington. His mother was a Keefe. ( this from.GRO register. ) https://www.gro.gov.uk/gro/content/certificates/indexes_search.asp
In 1891,Harry is to be found with his mother Ann and a sister Frances
In 1881 he is with his father, Henry, mother Ann and several siblings: Augustus, Edmund, Rosa and Frances. All children had a mother surnamed Keefe in GRO index. Mother Ann is said to have been born in Marylebone. Father was a coach painter as on marriage cert.
Melanie found other children born to this couple who died as infants; (Henry before 1871, Henry 1872 and Annie 1874).
1871 census, records family but with Ann Loader as being born in Killarney.
1865 Henry/Harry Loader coach painter married Bridget Keith in Notting Hill
( This seemed very odd but it appears that Bridget later started using the name Ann. Her surname was Keefe not Keith)
1851, Bridget (Keefe/ Keith) age 9 is to be found with her father Cornelius and family but the enumerator spelled the surname as Keif.( indexed Kief on ancestry)
We then looked at Augustus Loader (b 1866). He was the elder brother of Harry( b 1878).
Augustus married twice.
He died in Willesdon in 1943 leaving an estate of about £500 but no known relatives. The government put an advert for relatives in the paper . A newspaper index preserved the cutting with a note about his parents together with date and place of birth. It would appear this note used a copy of his birth cert for these details. ( mother stated as Bridget Loader formerly