"A lot of collisons are avoidable, some are not. Some are accidental, some are deliberate, some are rugby incidents.
"The constant referrals to the TMO stem from World Rugby being scared about being sued for millions and millions of pounds which they can't afford by players who have head injuries suffered from playing the game 20 years ago.
"That is having a direct impact on how the game is played today,
"Modern players are still banging their heads, and I know a lot out there who are struggling with head injuries. But it is a byproduct of playing. You take the choice. Sign a waiver when you start playing."