Just found your post from 2011 on Izzards of East London. My grandmother was Beatrice Nellie Mary Izzard born in Saskatchewan to John William Izzard and Emily Louise Moore (Canadian immigrants from London). I know that John William was born 1873 in Clerkenwell, Emily was born 1877 in Holborn and the two were married in the Parish of Holy Trinity, Gray's Inn Road. John William's father (John Henry Izzard) was born 1832 in Haggerstone and his wife (Mary Ann Riggs) was born 1831 in Syston, County of Leicestershire. I lose the Izzard trail with John William's father James Izzard who apparently died before 1870 but was in the London area for at least part of his life. In reviewing census records it appears that this Izzard line was in the general areas of London you mentioned. Because I have hit a brick wall on my Izzard ancestors, I was hoping that our lines may meet somewhere.
I also know that Emily Moore's parents were Henry William Moore (b. 1851 in Bethnal Green) and Emma ?? (b. about 1850 in Bath, County of Somerset).
I have been told that there are many Izzards in Sussex but cannot seem to connect my ancestors to anywhere but the London area. Would love to here out your line and any possible connection.