Gerard Cavlan, Brian Dooher and Stephen O'Neill have all been forced to withdraw from squad training.
BBC: SPORT | Northern Ireland | The Championship | Red Hands trio face fitness race
Meanwhile, a number of players were rested from Ireland senior squad training on Tuesday.
Six veteran players have been dropped from the initial squad training for both the Commonwealth Games and the Asian Games, and for the elite six-team Champions Trophy, in Lahore in October and November.
Northampton's Ben Foden and Wasps prop Tim Payne have also joined the England squad for training this week.
England's World Cup squad are training near picturesque Salzburg ahead of this summer's tournament, and captain Rio Ferdinand also took time out to support the 2018 bid.
The duo and the rest of Mali's squad are training in Abu Dhabi in the UAE ahead of the tournament which kicks off in Ghana on 20 January.
Chansa and the rest of Zambia's preliminary squad are training in Spain ahead of the tournament and will travel to play Tunisia at Rades on 6 January and they then take on Morocco six days later.
And Ward-Smith immediately looked to earning a recall to the England squad, having not featured since his call-up to the training squad ahead of the 2007 World Cup.
Ashton said he had to make "some very difficult decisions" in reducing his squad to the final 30, praising all 47 members of his original training squad for their "tremendous amount of effort" and "first class attitude".
According to a senior FFF official, the squad's training boycott was prompted by several players.
He was named in England's training squad during the Six Nations but did not get a game.
The Scarlets' scrum-half has a shoulder injury that rules him out of Warren Gatland's 24-man training squad.
The Saints squad are currently training in France, ahead of their second pre-season friendly against Dax on Friday.
Waseige says his final 23 will come from within the shrinking 30-man training squad and is refusing to consider alternatives.
The 37 includes the 17 members of the England elite training squad which McNamara is in the process of revising.
Robinson on Wednesday named his training squad for the Six Nations, which begins for Scotland against France in Paris on 5 February.
South African rugby president Oregan Hoskins insisted flanker Luke Watson should be included in a 46-man training squad, against the wishes of White.
Charteris was named in McBryde's original training squad for the tour, but stayed behind to help the Dragons' beat Calvisano 42-17 in Friday's Heineken Cup play-off.
He has written to the players' clubs demanding they be released from their league commitments to join up with the squad for the training camp in Portugal.
England need a win to guarantee their place in the knockout stages of the tournament and were boosted to see 22 of the 23-man squad at final training.
"Tuqiri is one that we could get a big improvement from with a revised training program so he will sit out the first two Tests (against Wales), " said Connolly at the squad's training base in Sydney.
Newcastle prop Micky Ward, Harlequins prop Mike Worsley, Saracens number eight Hugh Vyvyan, Leicester lock Louis Deacon, Newcastle centre Jamie Noon, Bath fly-half Olly Barkley and Newcastle scrum-half Hall Charlton make up the 30-man training squad.
BBC: SPORT | Rugby Union | Internationals | Corry out to cement England spot
The bulk of the squad's training work will be done at the state-of-the-art facility at Enettieres-En-Weppes, while Falcons coaches and players will also visit their hosts at Lille Rugby Club, to pass on their expertise to the ambitious side.
England boss Martin Johnson revealed Wood was told he was playing at the squad's training camp in Portugal last week and that one of his back-row rivals, Fourie, was not considered because he was only able to resume training this week.
BBC: Six Nations: Tindall leads England as Wood handed debut
"Yes and no, " read the tweet after split-squad scrimmages during spring training.
Exiles scrum-half Peter Richards failed to re-appear for the second half, prompting concerns over his fitness as he joins the England squad on Monday for training ahead of the Six Nations.
France's campaign was also marred by infighting, with Chelsea striker Nicolas Anelka sent home after refusing to apologise for verbally abusing Domenech, with the squad subsequently boycotting a training session by way of protest.
The new backroom team will put the Wales squad through their first training session in a week's time, given them just under a week to prepare for the Six Nations opener against England on 2 February.
In addition to the 22-man squad for the Murrayfield game, eight other players have been asked to attend training with the Irish squad this week.
Instead of vast maneuver grounds and lots of instructors and equipment, soldiers can train with small but high-tech gear such as Dismounted Soldier Training System, or they can practice techniques, such as squad tactics or IED recognition, using a training game on a laptop or even smartphones.
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