It is the station responsibility to have all the correct licence in place and Not the DJ / Presenter so you are safe to distribute your pre-recorded shows to anyone who wants them.
Thanks a lot for the answer. I'll finish polishing up the first few episodes then.
Just as an add on question here does this extend to their being no need for a license on the client side with regards to 'format shifting' the songs into the recordings to the file that is sent to the broadcasters or is that a different minefield?
A great deal depends on your country's laws (and how much they are enforced!) the kind of music you play (many specialist genres and independent labels are not always registered with the copyright authorities) and how popular your station becomes.
Beware though there are these startup companies that monitor all radio streams "on behalf of artists" and tip off copyright authorities. These are often the "bots" you might see constantly tuned in in your Centovacast panel; I've identified loads on the community radio streams for my district (admittedly those have to be registered to copyright and do run ads).
So it is up to you how much risk you want to take (I closed down my stream due to work pressures and a family bereavement, not because of copyright issues but another popular EDM station I worked with had to stop all its live shows (which where getting hundreds of listeners!) because it did get some warnings about copyright.