I'm fairly aware as to why we have numbers after the letters in postcodes but what I would like to know is why is there no S postcode?
We have SE,SW,W,NW,N,NE,E plus WC & EC no S.
Does anyone on here know & care to share?
Yes, the original SE postcodes were added in alphabetical order after SE1 and still are up to SE18, (Woolwich.)
When I worked for the old 'GPO,' in the 1960's, the SE postcodes only went up to SE19 and SE20, (South Norwood and Anerley respectively.) They must have been fairly recent additions back then and as London continued to expand, the others were added.