Thanks for all the information, I have searched Enumeration District with Grove Rd in but found nothing. It was in the Holloway area.
I will now search Elmore St in the 1881 Census just in case they have been indexed wrong as they appear to be living there later on.
Edward Ernest Hill father was William E Hill a furrier, mother Frances Hill. I believe they are living at 40 Elmore St, Islington on the 1891 Census, but his age is 26 it should be 46. I believe this to be correct as Edward was born at Holloway on the Census.
Frances died in 1897 at 39 Elmore St. His married daughter is living at 12, Elmore St on the 1901 Census.
There are many William Hill's living in Islington, his middle name varies from Edmund, Edward and Edwin.
Peter