Does Anyone Know Where I Can Find The Authority Codes For Lancashire?

[MagicSeven7]

I would be very appreciative if anyone knows where I can find the Authority Codes for Lancashire. It would be great if they could in a document like the one I have already been directed to and whose link is:

http://www.thensg.org.uk/iansg/document.htm?targ=410

I am also still looking for the USRN numbers for the following roads:

Ainsdale Drive, Preston

Brunswick Street, Chorley

Troutbeck Road, Chorley

Butler Street, Preston

Many thanks for all the help in advance.

[Nena82]

http://www.mrbvsg.co.uk/documents/LC%20Examples_of_various_List_of_Streets.PDF