[1][2] He played for Edinburgh District; and was part of the 1986–87 Scottish Inter-District Championship winning side.
His 42nd, and last, cap was won alongside his brother, Kenny who was representing his country for the first time as hooker.
Iain's final appearance came during the 1990 tour of New Zealand although he did not participate in the Scotland's 1990 Grand Slam.
Richard Bath writes of him that, he was In 2012, Milne took up the position of Vice President at Heriot's Rugby Club.
Known as "the Three Bears", the Milne brothers made one appearance together as the Barbarians front row.