Ron Lankshear has access to following for his research

I have some CDs 

Holden 1805 directory see 1805 Holden Title Page

1819 and 1856 Post Office Directory for London

1819 Post Office is only for Merchants and Traders- some 18,000 and was published by Critchett & Woods - much less data than the later Kelly's PO who took over in 1840s. 1819 does not appear to list Publicans whereas the Kelly's did.. 

1856 was published by Kelly's and has a lot more information - it also has a Court directory which seems to cover people who might be considered well off - the Trade directory means people in business - employees who have a trade are not usually shown. If you are looking for a Solicitor then it might well show his office and home. 

Some London Parish Registers for just a few years

Also I am sometimes devious enough to sometimes find your lost folk on 1881 and 1901 census - let me know what you know about them 

Send me an email you will find my addresses at Contact us - sorry you will have to type the address