22nd December 1972.

Radio Northsea's International Service came to an abrupt end on 24th October 1972. The evening shows were replaced by Dutch programmes. However, after only a few days, on 3rd November, the English language service was reinstated.
 
Before this interruption the International Service used the Prediction Hit 40 chart. Now it had a Top 30. The station continued with this for the next year.
 
Some of the details of this chart were obtained from a recording provided by Hans Knot, supplemented and confirmed with information from radiopedia.nl with grateful thanks to both.
 
The Pirate Radio Hall of Fame has put together a Spotify playlist of this chart. You can find it here. Unfortunately not all the songs are available on Spotify but almost all of them are and we hope it brings back good memories.

Mark Slate hosting the RNI Top 30 show on 22nd December 1972, a recording kindly provided by Hans Knot (duration 4 minutes 14 seconds)

The links from the songs on this page lead to the Amazon MP3 Store where you can hear short audio clips of the tracks and customers in the UK can buy downloads. Please see this note.
 
There are a number of other offshore charts listed on The Pirate Radio Hall of Fame. Full details here.
 
The most recent previous RNI chart we have is the Prediction Hit 40 from 21st October 1972. The next is from 30th March 1973.