BCNorwich
Hi, In OSM those two shops have the postcode NR1 3QJ. Royal Mail postcode finder lists only two addresses for NR1 3QJ numbers Just Cards at 6 St. Stephens Plain and Siddalls at 7 St. Stephens Plain. Note that's St. Stephens Plain, not St. Stephens Street.

The area of the junction of the four streets is named St. Stephens Plain, so I think the address is addr:street=St Stephens Plain.
