England's Six Nations injury worries continue to grow. Who will England miss the most?

We take a look at Stuart Lancaster's injury concerns ahead of England's Six Nations opener with Wales and beyond.

Ben Morgan

Morgan jumped ahead of Billy Vunipola in the No 8 pecking order after scoring two tries in a man-of-the-match display against Australia last November. But the forward suffered a broken leg during Gloucester's Aviva Premiership win over Vunipola's Saracens, ruling him out of the entire Six Nations. Morgan underwent successful surgery on his left fibula and England are hopeful he will be back competing for a starting spot come the World Cup.

Geoff Parling

The Leicester lock missed 11 weeks earlier this season, including the November internationals, after suffering two concussions in quick succession, but made his comeback in last month's win over Toulon. A studious lineout operator, Parling featured in all eight of the Tigers' games since his return, only to damage knee ligament during last weekend's Champions Cup loss to Ulster. He will miss the Six Nations opener in Cardiff.

Ben Foden

Despite missing out on selection for England's autumn series, Foden's form for Northampton Saints looked set to be rewarded with a Six Nations call-up. However, the 29-year-old full-back has been ruled out of the championship for a second successive year because of a knee injury, having ruptured his anterior cruciate ligament during Saints' win over the Ospreys earlier this month. Foden will miss the remainder of the season following surgery and faces a race against time to be fit for the World Cup.

Brad Barritt

Barritt outlined his bravery and commitment in England's autumn win over Australia, the bloodied Saracens centre making 18 tackles in an incredibly bruising encounter. The South African made his return from a calf injury in Sarries' demolition of Munster in the Rugby Champions Cup, only to suffer knee ligament damage against Clermont Auvergne the following weekend. Having been tipped to start at inside centre, Barritt will miss the Wales game but England are hopeful he will be in contention for the visit of Italy to Twickenham on February 14.

Joe Launchbury

The Wasps lock was an ever-present for England last season but he missed the November internationals with a neck problem. He has since undergone surgery, which will rule him out until April at least, and Stuart Lancaster will hope that he can get some club games under his belt before the end of the season. Launchbury has been a huge presence for his country and is a menace at the breakdown. Should he prove his fitness, he will be one of the first names in Lancaster's World Cup squad.

Owen Farrell

Farrell began 2014 as the incumbent fly-half for Lancaster's World Cup campaign. He started in all five of England's Six Nations matches, and one of the three June Test matches against the All Blacks at which point a drop in form led to calls for George Ford to replace him. The pair looked set for a showdown battle for the fly-half jersey before Farrell injured his knee against Clermont in the last round of European competition, ruling him out of the whole Six Nations.

Manu Tuilagi

England's midfield problems were compounded by the injury to Tuilagi. The Leicester centre did not feature at all in England's November internationals at the end of last year due to the recurrence of an ongoing groin injury suffered in the Tigers' Champions Cup clash with Ulster in October. Initially it was thought that he would be fit by the end of last year but the centre has failed to shake the injury and will now miss the entire Six Nations.

Courtney Lawes

Lawes injured his ankle in Northampton's clash with Leicester at the end of last year. Initially it was thought that the injury was not too serious but Lawes was forced to undergo surgery that will seem him miss England's opening Six Nations games. He is targeting the trip to Ireland on the March 1.

Kyle Eastmond

Eastmond featured in Bath's 35-18 destruction of Toulouse in the Champions Cup but left the field in the 63rd minute due to an old shoulder injury flaring up. He was deemed fit enough to feature against Glasgow a week later but left the field after just five minutes. It was confirmed this week that the centre will likely miss England's opening fixture against Wales, with a further inspection scheduled for Thursday.

Tom Wood

Wood hurt his ankle in Northampton's humbling 32-8 loss to Racing Metro on Saturday. He left the field shortly after the start of the second half and the swelling of his ankle has not reduced in time for him to be considered for the opening encounter against Wales. Tom Croft has been called up from the Saxons training camp as cover.

Alex Corbisiero

Corbisiero may be on the mend but the Northampton prop is still not fit enough to make the trip to Wales on Friday. Corbisiero's career was threatened by double knee surgery but he bounced back from that only to spend the last three months out with a shoulder injury. The loose-head prop has only played 40 minutes of rugby in the last two years and while England seem to have plenty of depth in the front row, Getting Corbisiero back to his Lions best ahead of the World Cup would be massive boost for England.