The song 'Admiral William Brown' by The Wolfe Tones was banned in Ireland.
The song was released in 1981 while the British army were going off to reclaim the Malvina's/Falklands after Argentina took them back
The song slagged off the British and was banned by the Irish government which at the time controlled the national airwaves.

When the music charts were being counted down and the d.j. got to the No.1 song he [Larry Gogan RTE]would say, and for the eight week at No1 it's The Wolfe Tones with Admiral William Brown and mutter some words like, we cant play the song because of section 23 of the broadcasting act, blaa, blaaa,

Paddy McGuigan of The Barleycorn was interned on The Maidstone Prison Ship just for writing Irish songs, while interned there he wrote The Men Behind The Wire, which was banned but when released went straight to No1 in the Irish charts.
They are just 2 examples of Irish songs that were banned