Despite the name, 2 tone does not refer to musical tones but to the colors black and white (as in the suites worn by Jamaican artists performing in UK and as the different skin colors, so it is more a reference to politics). I find fascinating how the music history may be connected to politic history or history tout court. In the 60s Jamaica obtained indipendency from UK, the island changes the previous flag inspired to the Union Jack into a new one, destined to be famous, the Black-Green-Gold Cross. Many people from Jamaica went to England, bringing their cultural roots and their music.
In the mid 70s many new band followed this new musical genre that took its name from the record label. One of them is the today proposal, with two songs, one from their first years and one from 2009 (they changed style thru the years).
Radio
Bermuda proposes today the ska title track (with its funny video start) from the 1979 album One Step Beyond... and the more recent Clerkenwell Polka from the 2009 album The Liberty of Norton Folgate by British band Madness! 
Have a good day and see you tomorrow.
