Wales' assistant coach Rob Howley said that World Rugby's refereeing chief Alain Rolland admitted an error by the Television Match Official in a conversation on Monday with Wales coach Warren Gatland.
The back-to-back training sessions will occur on Tuesday and Wednesday afternoon in west London, just days after England's controversial 12-6 win over Wales at Twickenham.
Their statement read: "World Rugby has clarified to the Wales team management as part of the usual review process with teams that the TMO made an error in the application of law during the England versus Wales match at Twickenham".
"It was good to have dialogue with World Rugby - they confirmed the TMO made a mistake", Howley confirmed. It is disappointing that happens in professional sport, but we focus on the next two weeks and getting ourselves ready for Ireland.More news: Commonwealth secret talks on whether Charles should succeed the Queen
"In accordance with law 21.1 b, Wales should have been awarded a try as the Wales player grounded the ball".
"There was plenty of time after that decision". So it's been nice to have a look at those two boys and they'll be options to look at in the June series to take them on tour, as we've done consistently where we look to take a couple of apprentices and keep adding to the squad.
Despite last weekend's loss, they remain in title contention behind Ireland and reigning champions England, the only two unbeaten teams left in this season's tournament.
Anscombe was at the heart of Wales' best moments, particularly when he switched to fly-half for the final 25 minutes and kept his team playing front-foot rugby.
Another powerful Shingler performance underlined how superbly he has taken his opportunity this season in a Wales back-row now shorn of injured British and Irish Lions Sam Warburton, Taulupe Faletau and Dan Lydiate.More news: Syria threatens to respond any future Israeli aggression
Leigh Halfpenny, Dan Biggar and Taulupe Faletau are all expected to return to full training by the end of the week.
"I think early on they probably had the superiority but I think we came back fairly well so it was an excellent session from us, the players really enjoyed it".
"Sam Moore is a likely lad, he reminds me of Kieran Reed with the way he plays, wide, angular runner, potentially can be a good lineout forward", added Jones. The game's done and dusted, so we've got to trust the referees and respect their integrity.
"If you only lose one game, the past has shown you can still go on and win the Championship".More news: Tillerson Announces Mandatory Sexual Harassment Training For All State Department Officials