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15th September 2015
12:56pm BST

Thomas and Michael Owen (left) celebrate Grand Slam success in 2005.[/caption]
In a statement posted on Worcester Warriors' website, Tomas said, 'I’ve learnt a huge amount during the last few months about head trauma, seizures and epilepsy, and it would be great if I could help out in some way.
'At the elite level of the game, I think the unions and medical departments of clubs do a great job and have a great understanding, but I still think it’s the players who need more educating about the warning signs and getting out of that ‘digging in’ mentality.
'I must stress, however, in no way would I discourage anyone from playing the game that has given me so much. Also in no way do I regret anything about my rugby career, and I wouldn’t change a thing.'
Thomas wants to stay involved in the game 'in some capacity' and to pitch himself into charitable efforts involving head injuries.
The retirement of the Welsh and Warriors No.8 follows similar decisions taken by Rory Watts-Jones and Ireland prop Declan Fitzpatrick to walk away from the game after all too frequent concussions.
In the past two weeks, Wales have lost Leigh Halfpenny, Rhys Webb and Eli Walker to injury ahead of the World Cup.
Those players will, rightfully, feel unlucky at missing out.
For Thomas, though, this is journey's end.
A new, stark journey is just beginning.Explore more on these topics: