Internet radio station Medieval always unavailable

iTunes radio on any of my IOS products (iPhone 6, iPads or iPad minis) refuses to play my favourite station, Medieval & Renaissance. The symptoms are as follows:

a) itunes radio will play this station the first time it is opened in the Music app on the IOS device.

b) at some stage, it will stop playing the station and says it is "temporarily unavailable"

c) it never becomes available again.

All other stations never exhibit this frustrating behaviour. iTunes Radio works brilliantly for every station (featured or added) EXCEPT for my favourite, Medieval. Maybe there is a message here !!

To try and fix the problem I have:

a) closed the app and reopened it

b) logged out of iTunes and logged back in

c) done a warm and cold reset of the IOS device

Nothing works.

Suggestions please.