Dr Danny Lang suggests a height line should be visible on shirts; plus letters from Andrew Keeley, Michael Burns and Ian Coltart
I think the Ireland rugby union captain and head coach, Johnny Sexton and Andy Farrell, have a valid point about lowering the tackle height to the waist, a variable anatomical landmark (Johnny Sexton criticises RFU for lowering tackle height for amateurs, 23 January).
My experience includes playing amateur schools rugby at a high level in Ireland and being the doctor for Launceston Rugby Club and Cornwall RFU. (This included time when Launceston were at a high level, playing professional teams.) I have seen the game get faster, more physical, and sometimes indisciplined. As a doctor, I am most concerned about the risks of long-term neurological damage. As a spectator, I love to see good, open rugby.
