My Great Grandmother was married to him, but my Grandad was born out of wedlock in 1893 and was not his Son.
Frederick was never registered as Frederick. The birth certificate and Census details list him as FRED HOLMES. He was born on 7th June 1866 and married my Great Grandmother in Jan 1886. In 1891 he is listed on the Census with my G. Grandma and his children. In 1901 he was living away - with a woman he names as being a Cousin and her baby. I cannot find any connection to her being a Cousin and am unable to locate hm in 1911, however - there is a large crossing out on G Grandmas entry where it appears she tried to list herself on the Census as being single, but is then reinstated her as being married. I have read the details of the case at the National Archives, and am aware that the entry of his age on the death certificate following his execution is inaccurate.
I had a quick look at the HO 144/1448/308338. Maybe thats the one you looked at. It could be that there are others, such as a PCOM or ASSI files that are grouped in other boxes but they tend not to be that well kept at that time, so much so, that the newspaper articles could contain far more information. I have not looked. I tend not to look into the geneology at all so cant comment. Looks like he had a bit of a criminal record, so there could be photos somewhere in Manchester. Could be photos in the newspapers, they were just getting to it about them. Its one of those interesting years that has just turned 100. But it wasn't really that long ago.