OS Code-Point® Open provides points representing locations of UK Postcodes along with basic contextual information, including ONS county, district, ward and NHS codes.
OS Code-Point Open can be combined with other OS datasets, such as OS Open Map Local or OS Vector Map District to provide map reference information. The data can also be used in spatial and demographic analysis or for building basic gazetteer search or geocoding functionality.
We have enhanced the original dataset by providing correctly formatted (single spaced) postcodes and separate postcode area, district and sector attributes.
GIS4BUSINESS is an OS Partner and can supply OS Code-Point Open data in most major formats and for the coverage you require, from a small area to full UK coverage.