Super League XII gets under way on 4 February when St Helens begin the defence of their crown against Huddersfield.

Saints, who won every trophy available to them last season, are the team to beat this time around but they will face a stiff challenge with their 11 Super League rivals all active in the transfer market over the winter.

Top-quality imports including the likes of Trent Barrett, Matt Sing and Brent Webb have arrived from the NRL, while Adrian Morley also returns to Super League after six years with Sydney Roosters.

Elsewhere, players such as David Solomona, Luke Dorn, Paul Johnson, Danny Orr, Vinnie Anderson and Michael Withers have sought new challenges.

BBC Sport rounds up all the comings and goings, as well as other key info on every club.

Bradford Bulls Catalans Dragons Harlequins Huddersfield Giants Hull FC Hull KR

Leeds Rhinos Salford City Reds St Helens Wakefield Trinity Wildcats Warrington Wolves Wigan Warriors

Coach: Steve McNamara (since April 2006)

Captain: Paul Deacon

Last season: Fourth, knocked out by Hull FC in play-offs

Ins: James Evans (centre), Chris Feather (prop), Glenn Morrison (second row), Michael Platt (full-back), David Solomona (second row)

Outs: Marcus Bai (winger), Matty Brooks (half-back), Brett Ferres (second row or loose forward), Stanley Gene (utility back), Paul Johnson (centre or second row), Karl Pryce (winger), Michael Withers (full-back), Mark Flanagan (stand off), Brad Meyers (second row)

Squad list: 1 Marcus St Hilaire 3 Ben Harris, 4 Shontayne Hape, 5 Lesley Vainikolo, 6 Iestyn Harris, 7 Paul Deacon, 8 Joe Vagana, 9 Terry Newton, 10 Andy Lynch, 11 Chris McKenna, 12 Glenn Morrison, 13 Jamie Langley, 14 Chris Feather, 15 Matt Cook, 16 Ian Henderson, 17 James Evans, 18 Sam Burgess, 19 Michael Platt, 20 Andy Smith, 22 Craig Kopczak, 23 Matt James, 24 Dave Halley, 25 Jason Crookes, 26 David Solomona, 27 Antony Tonks

Coach: Mick Potter (since February 2006)

Captain: Stacey Jones

Last season: 12th

Ins: Jason Croker (second row), David Ferriol (prop), Aaron Gorrell (hooker), Clint Greenshields (full-back), Casey McGuire (stand-off), Adam Mogg (centre), Sebastian Raguin (prop), Dimitri Pelo (winger), Vincent Duport (second row), Andrew Bentley (loose forward), Kane Bentley (hooker)

Outs: Chris Beattie (prop), Ian Hindmarsh (second row), Julien Rinaldi (scrum-half or hooker), Pascal Jampy (second row), Renaud Guigue (centre), Bruno Verges (wing), Laurent Frayssinous (stand-off), Teddy Sadaoui (hooker), Sean Rudder (centre), Mark Hughes (centre), Aurelien Cologni (loose forward)

Squad list: 1 Clint Greenshields, 2 Justin Murphy, 3 John Wilson, 4 Adam Mogg, 5 Dimitri Pelo, 6 Casey McGuire, 7 Stacey Jones, 8 David Ferriol, 9 David Berthezene, 10 Jerome Guisset, 11 Sebastien Raguin, 12 Jason Crocker, 13 Gregory Mounis, 14 Thomas Bosc, 15 Mathieu Griffi, 16 Lionel Teixido, 17 Cyril Gossard, 19 Alex Chan, 20 Adel Fellous, 21 Julien Touxagas, 22 Jamal Fakir, 23 Aaron Gorrell, 24 Remy Casty, 25 Younes Khattabi, 26 Vincent Duport

Coach: Brian McDermott (since July 2006)

Captain: Rob Purdham

Last season: Seventh

Ins: Jon Grayshon (back row), Scott Hill (stand-off), Chris Melling (hooker), Danny Orr (stand-off, ), Julien Rinaldi (scrum-half or hooker), David Tootill (prop)

Outs: Nick Bradley-Qalilawa (winger), Neil Budworth (hooker), Luke Dorn (scrum-half), Sione Faumuina (second row), Tim Hartley (stand-off), Solomon Haumono (prop), Thomas Leuluai (scrum-half), Filimone Lolohea (prop), Joe Mbu (second row), Paul Noone (back row), Rikki Sheriffe (winger), Anthony Stewart (winger), Mark Tookey (prop), Pat Weisner (hooker or half-back), Danny Williams (prop)

Squad list: 1 Mark McLinden, 2 Jon Wells, 3 Paul Sykes, 4 Tyrone Smith, 6 Scott Hill, 7 Danny Orr, 8 Karl Temata, 9 Chad Randall, 10 Daniel Heckenberg, 12 Lee Hopkins, 13 Rob Purdham, 14 Julien Rinaldi, 15 David Mills, 16 Chris Melling, 17 Louie McCarthy-Scarsbrook, 18 Matt Gafa, 19 Tony Clubb, 20 Jon Grayshon, 21 David Tootill, 22 Mike Worrincy, 23 Henry Paul, 25 Zebastian Luisi

Coach: Jon Sharp (since August 2003)

Captain: Chris Thorman

Last season: Ninth

Ins: Shane Elford (centre), Darrell Griffin (prop), Ryan Hudson (hooker), John Skandalis (prop), Jamahl Lolesi (centre)

Outs: Michael De Vere (centre), Jim Gannon (prop), Jon Grayshon (back row), Wayne McDonald (prop), Paul March (half-back or hooker), Albert Torrens (centre), Luke George (winger), Stuart Donlan (full-back), James Evans (centre), Bolu Fagbourn (winger)

Squad list: 1 Paul Reilly, 2 Martin Aspinwall, 3 Jamahl Lolesi, 4 Kevin Brown, 5 Shane Elford, 6 Chris Thorman (capt), 7 Robbie Paul, 8 Eorl Crabtree, 9 Brad Drew (vice capt), 10 John Skandalis, 11 Chris Nero, 12 Andy Raleigh, 13 Stephen Wild, 14 Stuart Jones, 15 Paul Jackson, 16 Keith Mason 17 Paul Smith, 18 Darrell Griffin, 19 Ryan Hudson, 20 Stephen Snitch, 21 Matt Gardner, 22 Tom Hemingway 23 Simon George, 25 Leroy Cudjoe

Coach: Peter Sharp (since April 2006)

Captain: Lee Radford

Last season: Second, lost in Grand Final to St Helens

Ins: Wayne Godwin (hooker), Hutch Maiava (prop), Willie Manu (second row), Matt Sing (winger), Danny Tickle (second row)

Outs: Nathan Blacklock (winger), Kirk Dixon (winger), Chris Chester (forward), Liam Higgins (prop)

Squad list: 1 Shaun Briscoe, 2 Matt Sing, 3 Kirk Yeaman, 4 Sid Domic, 5 Gareth Raynor, 6 Paul Cooke, 7 Richard Horne, 8 Ewan Dowes, 9 Richard Swain, 10 Garreth Carvell, 11 Lee Radford, 12 Shayne McMenemy, 13 Danny Washbrook, 14 Motu Tony, 15 Paul King, 16 Danny Tickle, 17 Willie Manu, 18 Wayne Godwin 19 Graeme Horne, 20 Richard Whiting, 21 Hutch Maiava, 22 Craig Hall, 23 Tommy Lee, 24 Anthony Thackeray, 25 Matty Dale, 26 Scott Wheeldon, 27 Danny Houghton, 28 Mike Burnett, 29 Nathan Freer, 30 Ross Divorty

Coach: Justin Morgan (since July 2005)

Captain: James Webster

Last season: Promoted from National League One

Ins: Matty Brooks (half-back), Luke Dyer (utility back), Jim Gannon (prop), Stanley Gene (utility back), Mark O'Neill (prop), Michael Vella (prop), Danny Ward (prop), Pat Weisner (hooker or half-back), Andreas Bauer (utility back), Chris Chester (forward)

Outs: Dwayne Barker (second row), Damien Couturier (centre), Andy Ellis (hooker), James Garmston (prop), Phil Joseph (hooker), Gareth Price (prop), Leroy Rivett (winger), Jon Whittle (centre), Frances Stephenson (prop)

Squad list: 1 Ben Cockayne, 2 Jon Steel, 3 Jon Goddard, 4 Gareth Morton, 5 Byron Ford, 6 Scott Murrell, 7 James Webster, 8 Makali Aizue, 9 Ben Fisher, 10 David Tangata-toa, 11 Iain Morrison, 12 Michael Smith, 13 Tommy Gallagher, 14 Stanley Gene, 15 Jim Gannon, 16 Jason Netherton, 17 Mark O'Neill, 18 Danny Ward, 19 Matty Brooks, 20 Mick Vella, 21 Luke Dyer, 22 Andreas Bauer, 23 Pat Weisner, 24 TBC, 25 TBC, 26 Dave Wilson, 27 Kirk Netherton

Coach: Tony Smith (since July 2005)

Captain: Kevin Sinfield

Last season: Third, lost to Warrington in play-offs

Ins: Kylie Leuluai (prop), Brent Webb (full-back)

Outs: Chris Feather (prop), Richie Mathers (full-back), Shane Millard (hooker), Mark O'Neill (prop), Willie Poching (second row), David Tootill (prop), Chev Walker (centre)

Squad list: 1 Brent Webb, 2 Scott Donald, 3 Clinton Toopi, 4 Keith Senior, 5 Lee Smith, 6 Danny McGuire, 7 Robert Burrow, 8 Kylie Leuluai, 9 Matt Diskin, 10 Jamie Peacock, 11 Jamie Jones-Buchanan, 12 Gareth Ellis, 13 Kevin Sinfield (capt), 14 Ali Lauitiiti, 15 Jamie Thackray, 16 Ryan Bailey, 17 Nick Scruton, 18 Ian Kirke, 19 Danny Williams, 20 Ashley Gibson, 22 Carl Ablett, 23 Jordan Tansey, 24 Ben Kaye, 25 Ryan Hall, 26 Luke Burgess, 27 Michael Ratu

Coach: Karl Harrison (since June 2002)

Captain: Malcolm Alker

Last season: Fifth, lost to Bradford in play-offs

Ins: Luke Dorn (half-back), Mark Edmondson (prop), Danny Halliwell (centre), Stephen Nash (utility), Lee Jewitt (second row), Michael Korkidas (prop), Gray Viane (centre)

Outs: Simon Baldwin (second row), John Clough (hooker), Ryan Clayton (centre or second row), Andrew Dunemann (half-back or hooker), Tim Jonkers (second row), Stephen Myler (half-back), Mitch Stringer (prop), Junior Langi (centre), Sean Rutgerson (prop), Danny Lima (prop), Chris Charles (loose forward)

Squad list: 1 Karl Fitzpatrick, 2 David Hodgson, 3 Kevin McGuinness, 4 Aaron Moule, 5 John Wilshere, 6 Luke Dorn, 7 Luke Robinson, 8 Andy Coley, 9 Malcolm Alker, 10 Michael Korkidas, 11 Mark Edmondson, 12 Ian Sibbit, 13 Simon Finnigan, 14 Paul Highton, 15 Gray Viane, 16 Andrew Brocklehurst, 17 Gareth Haggerty, 18 Luke Adamson, 19 Stuart Littler, 20 David Gower, 21 Stephen Nash, 22 Danny Halliwell, 23 Jordan Turner, 24 Lee Jewitt, 25 Daley Williams

Coach: Daniel Anderson (since May 2005)

Captain: Paul Sculthorpe

Last season: First, won Grand Final against Hull FC

Ins: Matt Gidley (centre), Bryn Hargreaves (prop)

Outs: Paul Anderson (prop), Vinnie Anderson (centre or second row), Miles Greenwood (full-back), Gareth Langley (winger), Jamie Lyon (centre), Ian Webster (utility)

Squad list: 1 Paul Wellens, 2 Ade Gardner, 3 Matt Gidley, 4 Willie Talau, 5 Francis Meli, 6 Leon Pryce, 7 Sean Long, 8 Nick Fozzard, 9 Keiron Cunningham, 10 Jason Cayless, 11 Lee Gilmour, 12 Jon Wilkin, 13 Paul Sculthorpe, 14 James Roby, 15 Mike Bennett, 16 Jason Hooper, 17 James Graham, 18 Bryn Hargreaves, 19 Ian Hardman, 20 Scott Moore, 21 Matty Smith, 22 Paul Clough, 23 Maurie Fa'asavalu, 24 Ste Tyrer, 25 Ste Bannister

Coach: John Kear (since July 2006)

Captain: Jason Demetriou

Last season: 10th

Ins: Ricky Bibey (prop), Matt Blaymire (full-back or winger), Brett Ferres (second row or loose forward), Peter Fox (winger), Luke George (utility back), Jason Golden (second row), Danny Lima (prop), Paul March (half-back or hooker), Richard Moore (prop), Waine Pryce (winger), Danny Sculthorpe (prop)

Outs: Monty Betham (second row), Jamie Field (second row), Maxime Greseque (scrum-half), Darrell Griffin (prop), Kevin King (centre), Michael Korkidas (prop), Tommy Saxton (utility back), David Solomona (second row), John Whittle (centre), David Wrench (prop), Colum Halpenny (full-back)

Squad list: 1 Mark Field, 2 Waine Pryce, 3 Jason Demetriou, 4 Ryan Atkins, 5 TBC, 6 Jamie Rooney, 7 Ben Jeffries, 8 Adam Watene, 9 Sam Obst, 10 Danny Sculthorpe, 11 Ned Catic, 12 Duncan Macgillivray, 13 Brett Ferres, 14 Paul March, 15 David March, 16 Ricky Bibey, 17 Kevin Henderson, 18 Olivier Elima, 19 Danny Lima, 20 Tevita Latu, 21 Matt Blaymire, 22 Peter Fox, 23 Jason Golden, 24 Dale Ferguson, 25 Richard Moore, 26 Luke George, 27 Austin Buchanan, 28 Paul White, 29 Mark Applegarth, 30 Steve Lewis

Coach: Paul Cullen (since August 2002)

Captain: Lee Briers

Last season: Sixth, lost to Bradford in play-offs

Ins: Vinnie Anderson (centre or second row), Paul Johnson (centre or second row), Adrian Morley (prop or second row)

Outs: Mark Hilton (prop), Toa Kohe-Love (centre), Danny Lima (prop), Paul Noone (back row), Logan Swann (back row), Andy Bracek (second row, loan), Ben Harrison (forward, loan)

Squad list: 1 Stuart Reardon, 2 Henry Fa'afili, 3 Martin Gleeson, 4 Paul Johnson, 5 Brent Grose, 6 Chris Bridge, 7 Lee Briers, 8 Chris Leikvoll, 9 Jon Clarke, 10 Paul Rauhihi, 11 Adrian Morley, 12 Ben Westwood, 13 Vinnie Anderson, 14 Mark Gleeson, 15 Rob Parker, 16 Paul Wood, 17 Michael Sullivan, 18 Richie Barnett, 19 Steve Pickersgill, 20 Simon Grix, 21 Andy Bracek, 22 Ben Harrison, 23 Mike Wainwright, 24 Chris Riley, 25 Mike Cooper, 26 Kevin Penny

Coach: Brian Noble (since April 2006)

Captain: Sean O'Loughlin

Last season: Eighth

Ins: Phil Bailey (centre or second row), Trent Barrett (stand-off), Thomas Leuluai (scrum-half), Shane Millard (hooker), Michael Withers (full-back), Mark Flanagan (stand-off)

Outs: Michael Dobson (scrum-half), Brett Dallas (winger), Wayne Godwin (hooker), Bryn Hargreaves (prop), Danny Orr (stand-off), Danny Sculthorpe (prop), Danny Tickle (second row), Scott Logan (prop), Chris Melling (hooker), Lee Jewitt (second row)

Squad list: 1 Chris Ashton, 2 Mark Calderwood, 3 Phil Bailey, 4 Michael Withers, 5 Pat Richards, 6 Trent Barrett, 7 Thomas Leuluai, 8 Stuart Fielden, 9 Mickey Higham, 10 Iafeta Paleaaesina, 11 Gareth Hock, 12 Bryan Fletcher, 13 Sean O'Loughlin, 14 David Vaealiki, 16 Shane Millard, 18 Paul Prescott, 19 Harrison Hansen, 20 Darrell Goulding, 21 Danny Hill, 22 Joel Tomkins, 23 Liam Colbon, 24 Eamon O'Carroll, 25 Mike McIlorum, 26 Thomas Coyle, 27 Sean Gleeson, 28 Mark Flanagan