Radio Caroline will be awarded a license to transmit on 648 kHz AM. From
the Radio Caroline website
where I can't deeplink to the right article (Home - Am Licence):
AM LICENCE ‐ A KILOWATT ON 648
We are pleased to announce that Ofcom have informed us that our application for an AM licence has been approved and that a licence will be awarded.
The basis of our application was that our traditional heartland was Essex and Suffolk, where the signal from our ships made first landfall and that we wished to entertain on AM, an audience that we have not been able to serve in this way since 1990.
We said that this audience may hear music radio of a style they remember and in some cases presented by the same people they remember.
That in essence is what we intend to do.
We can now announce that our AM frequency will be 648 kHz with a power of 1000 watts. This is ERP or simply the power radiated by the aerial.
A transmitter was imported from the Continent a few days ago and is now being modified to suit the frequency. There are further hurdles, but as you can see progress is being made.
The frequency (648 kHz, once BBC 648 / BBC Europe / BBC world service) isn't
very good for local community radio (needs big antennas) so one 'big' station
is a better idea. I think reception in the Netherlands will be possible when
local interference is minimal.