@ A J Stiles

I doubt housenumber/postcode is as unique one might hope...

1, london road, manchester M1 1AA

1, manchester road london NW1 1AA

1, Gadzooks Crescent, Leeds L1 1ZQ

1, Fraud Street, Truro TR1 1AQ

and so on, through the other 4745520000 combinations.... :-)

The /whole/ post code is much more unique - but presumably some genius decided to scan only the numeric components.