Search the historical London street directory and pub history site by surname, street or pub name; you will find many obscure early street addresses in London through the Victorian pub history of London and early parish and licensing records on this site. Most records are before 1944 plus some modern detail, and lots of pictures.
History of East London & Essex , and East of London.
This map shows the rough boundaries of a London Parish in 1900
I am extremely grateful to David Hale for allowing me to link to his maps at the MAPCO site , a fantastic resource which is now back online again.
Here is the Scottish nls site (national library of Scotland) - There are over 86,000 maps as high-resolution, colour, zoomable images. The maps date between 1560 and 1961 and relate primarily to Scotland, but also maps of England and Great Britain, Ireland, and Belgium.
1800 - East Ham & West Ham 1800 Map from Silvertown – a neighbourhood, by Arthur Philip Crouch 1900.
For maps of Essex, I have only found one decent site - see the Foxearth site maps ; I always welcome feedback if you know otherwise.
1852 - Watkins Commercial & General Map in 1852 (Watkins map page)
There are a considerable number of maps on the mapco site which are absolutely brilliant, e.g. in 1857
1900 - Street Map of London
The assorted Maps of Tower hamlet is an absolutely brilliant resource I have been keeping to myself - it allows simultaneous views of different peiods in time - i.e. 1745, 1766, 1801, 1802, 1822, 1831, 1844, 1853, 1882, 1952 & 2000 for bethnal Green & Stepney.
And more Maps of Tower Hamlet in 1745, 1801, 1831, 1853, 1861, 1875, 1882, 1952 & 2000 for Bow, Bromley & Poplar.
1899 - The London Railway map of Central London in 1899
1900 - East Ham & West Ham 1900 Map from Silvertown – a neighbourhood, by Arthur Philip Crouch 1900.[an error occurred while processing this directive]
The Baedeker Old Guide Books (includes London and its environs 1905 & 1910) & the WORLD
Modern - Streetmap.co.uk
With thanks to the site at victorianlondon.org which holds a fantastic array of other London Victorian material.