It's 40 years since postcodes were rolled-out across the UK to make letter-sorting easier.
Norwich pioneered the idea and, to mark its role, has been issued with a blue plaque for the city centre by Royal Mail.
There are now 1.8 million postcodes covering 29 million addresses across the country.
More top news
All week we've been telling you inspiring tales of some of the region's unsung heroes.
Dry through the evening but cloud will spread in followed by outbreaks of rain. The winds will strengthen during the early hours.
A Norwich MP has apologised "unreservedly" after a video of him telling someone to "get on your knees b****" emerged.