It’s interesting to see that many websites that were using a data feed from one other website are now, (Oct 6th) without a feed any more due to a dispute between the Royal Mail and the site feeding Postcodes.
Just goes to show how relying on a single source is always a bad idea!
The database is still available for download for those that find some of their usual websites unable to satisfy. 
See BBC NEWS | Technology | Legal threat closes postcode feed
Andy
MA0FMF