WALES medical staff will have access to instant video replays during the rest of this season's RBS 6 Nations Championship.

It follows incidents involving wing George North, who suffered two blows to the head during last Friday's Six Nations opener against England in Cardiff.

The Wales star took an accidental boot to the head from England lock Dave Attwood in the first-half, and he was temporarily replaced by Liam Williams while he underwent mandatory concussion assessment.

North subsequently returned to the field, but he then clashed heads with team-mate Richard Hibbard during the second-half in what appeared to be a worse incident, which subsequently attracted attention from rugby union's global governing body World Rugby.

North did not go off a second time, playing on as England started their Six Nations campaign with a 21-16 victory.

"After any incident like this we will always write our own report," Welsh Rugby Union national medical manager Prav Mathema told WRU TV on Monday night.

"World Rugby asked us for that on Saturday, and we duly delivered the same day.

"Since the incident, we have seen where our protocols need to improve.

"For the next four games of the Six Nations, we are certainly going to have instant video replays for home and away matches.

"We've also had this discussion with World Rugby, and we are hopeful that our discussions will spark some form of global intervention as well with regards to this.

"Pitchside practitioners sometimes will need help.

"There are the rare occasions, like the one on Friday night, when sometimes things are unsighted. Where possible, we need to enhance these protocols, which is certainly something we are looking to do in the immediate term.

"Concussion is a really important injury that we at the WRU take incredibly seriously.

"We want to make sure people understand and recognise the need to remove concussed players, and make sure the message is delivered not just here in Wales, but globally."

Northampton ace North has now started return to play protocols. Wales resume their Six Nations campaign against Scotland at BT Murrayfield next Sunday.

Mathema added: "George, since the incident on Friday, has been symptom-free the whole time.

"Post-match he was symptom-free, today he has also been evaluated and he has shown no signs and symptoms of any concussion.

"Because of that he has actually started his return to play protocol already, and there has been no issue with the first stages of that.

"George will go through a step-by-step process of increasing his cognitive and his physical activity through the week.

"He will be assessed every single day by a doctor, and he will also get a neurological opinion before we make a decision whether or not he is fit to return to play.

"In the first incident, George took a blow to the head from an accidental boot. Following that, we attended to him on the field of play, and we weren't quite sure as a medical team at that point about his diagnosis.

"Because of that, we decided to use the head injury assessment protocol, and he went off for 10 minutes for a review. That was deemed negative, so he returned to the field of play.

"In the second incident, regrettably I was unsighted at that moment. The other pitchside medic on the far side of the pitch was also unsighted.

"All I saw was George North getting up off his knees. When I arrived at the scene, as it were, he was completely lucid and was conversing spontaneously with me. I undertook some on-pitch evaluations, and at that point I deemed him fit to continue.

"Regrettably, we didn't get a chance to see the incident, and had I been given that opportunity, there is no doubt he would have been removed from the field of play.

"There are no pitchside replays available currently, and the independent match-day doctor was unable also to aid us in that process.

"We, unfortunately didn't see it, but having seen it since, obviously, there is no doubt it looks like he has a momentary loss of consciousness, and in that case he should definitely be removed from the field of play."