Re: Sharrock's in Liverpool.
If your grandfather was Alfred Harrison Sharrock, then I guess we're related.
My Great Great Grandfather was Thomas Sharrock b.1852. He married Mary Billington in 1873 and they had two daughters; Mary Margaret Sharrock b.1874 (My Great Grandma) and Isabella Sharrock b.1878.
Mary Snr died in 1890 and he remarried Annie Harrison (probably your Great Grandma). They had three children up unitl 1901 Census; Thomas Alfred Sharrock b.1892, Frederick Sharrock b.1896 and Charles Sharrock b.1897.
The family in 1901 are living with Annie's father John Harrison. I think it's conceivable that they also had your Grandfather Alfred in 1906, certainly with the connection of the name Harrison.
Thomas (b.1852) trade was a butcher as was his father, also Thomas b.1822.