Hi Jo,
(wrote this just before Eric posted!)
that is such bad luck, Ashley Lane starts on the NW map and crosses over to finish on the NE that you have

So for the whole street you need the Manchester NW as well.
On the top left rectangle of your NE map, find the words ST MICHAEL WARD in large print, go left and you see the famous St Michaels Flags (Angel Meadow). Just above there you've got the word 'Ashley' and the end of the lane which leads on to Portland St.
I have the street index booklets published by the M/cr and Lancs FHS, which really help with finding places
www.mlfhs.org.uk 
Barbara