World Rugby’s chief medical officer Martin Raftery insists changes could be made to tackle laws to reduce the risk of concussion.

The admission comes three days into the 2015 World Cup and less than a week after former Wales flanker Jonathan Thomas was forced to retire due to epilepsy that is thought to have been caused by multiple head traumas.

BBC’s Panorama programme, to be screened on Monday evening, was told by Raftery that a safety review is in progress that may lead to a revision of the laws governing the tackle.

“There’s no doubt that the biggest area that we think, that we know where concussion is going to occur is in the tackle, so that will help us to look at the tackle and see what we can do to make it safer,” Dr Raftery said.

“It could be (that the laws are adjusted). I think that my job is to identify risk and then look for solutions to the law-makers to make the changes that will bring about protection of the athlete.”

Reports of concussions have almost doubled in British grassroots rugby over the past few years, however the Scottish Rugby Union’s chief medical officer, Dr James Robson believes that could be a positive.

“Two seasons ago we had a real push, a real initiative – we educated people that only by knowing what was happening with injury could we make a significant difference,” Robson said.

“I truly believe that the doubling between that season and the following season of the number was actually down to that education.

“I strongly believe that we do need to look at the laws of the game and the way that it’s played.”

Five days ago Thomas, who won 67 Wales caps between 2003 and 2011 and played in two World Cups, retired on medical advice at the age of 32 after incurring a degree of brain injury.

“I still think it’s the players who need more educating about the warning signs and getting out of that ‘digging in’ mentality,” Thomas said.

Concussion was identified as the most common match injury for a third successive year in the Rugby Football Union’s annual injury audit for 2013-14, which was published in February.

Head trauma now constitutes 12.5 per cent of all match injuries and has increased 59 per cent on the figures published for the 2012-13 season, rising from 54 instances incurred to 86.