Are you aware of the signs and symptoms of concussion, do you know the official protocol for dealing with it...sure?
Whether player, coach, parent/guardian, match official, teacher or supporter have you completed the RFU Headcase Concussion Awareness Course...
Its FREE and ONLINE
If you've completed it, great, take a refresher and complete it again
Follow the link
http://https://www.englandrugby.com/participation/playing/headcase