The Royal Mail postcode finder (http://www.royalmail.com/find-a-postcode http://www.royalmail.com/find-a-postcode) offers 1 and 1A for that postcode, but not 0.

The Royal Mail postcode finder (http://www.royalmail.com/find-a-postcode http://www.royalmail.com/find-a-postcode) offers 1 and 1A for that postcode, but not 0. I had a look on Street View too and I think the houses to the left of number 1 (which you can clearly see) are probably 1A and belonging to the orthogonal road, respectively.