Six Nations 2014: Scrum V on the great Welsh-Irish rivalry

Eddie Butler traces the origins of the Wales-Ireland rugby rivalry and an infamous clash between the sides in 1914.

The rivalry has intensified during recent years with former Ireland coach Warren Gatland now in charge of Wales.

Gatland caused consternation among Irish fans last summer when he dropped Brian O'Driscoll for the British and Irish Lions' third and final Test against Australia.