Analysis of Labour MPs' loyalty

In March 2016 a spreadsheet analysing where MPs stood in relation to Mr. Corbyn was "discovered".

Here's a Guardian article.

Labour’s chief whip, Rosie Winterton, and its London mayoral candidate, Sadiq Khan, have been labelled as “hostile” in a leaked document that appears to rank the party’s MPs by their loyalty to the leader, Jeremy Corbyn.
Members of parliament have been separated into five different sections ranging from a “core group” of loyalists, through “neutral but not hostile”, to a final “hostile” list that includes those believed to be most negative about the current leadership.
The document underlines unrest within the shadow cabinet with a number of frontbench MPs listed in the fourth “core negative group” including Lucy Powell at education and Maria Eagle, who was moved from her role in defence to culture.
They have been placed alongside Dan Jarvis – who is seen as a potential leadership candidate if MPs try to trigger a coup against Corbyn.
A spokesman for Corbyn categorically denied a claim by the Times, which was leaked the list, that it was drawn up by Katy Clark, Corbyn’s political secretary. They also pointed out that the list included Harry Harpham, who died of cancer last month and the late veteran MP Michael Meacher who died in October. He is listed in the core group with “RIP” before his name.
Some backbenchers speculated that the hand of Damian McBride, the combative spin doctor to Gordon Brown who recently joined the team of the shadow defence secretary, Emily Thornberry, may have been behind the release of the list. The suggestion is categorically denied by McBride.
A spokesman for Corbyn said: “It doesn’t come from this office and we have no knowledge of it.” He insisted that it did not represent the leader’s views either.
David Cameron seized on the list at prime minister’s questions, joking that he would put himself in the category of “core support” for Corbyn. “I thought I had problems,” he added.

And a chart

Here's the full list from LabourList:

CORE GROUP	CORE GROUP PLUS	NEUTRAL BUT NOT HOSTILE	CORE GROUP NEGATIVE	HOSTILE GROUP
Andy McDonald	Andy Slaughter	Alan Whitehead	Alan Johnon	Alan Campbell
Catherine Smith	Angela Rayner	Adrian Bailey	Alan Meale	Alison McGovern
Dennis Skinner	Alex Cunningham	Andrew Gwynne	Angela Smith	Ann Coffey
Diane Abbott	Albert Owen	Andy Burnham	Anna Turley	Barry Sheerman
Grahame Morris	Catherine West	Andrew Smith	Ed Miliband	Caroline Flint
Ian Lavery	Margaret Greenwood	Angela Eagle	Ben Bradshaw	Chris Evans
Ian Mearns	Carolyn Harris	Ann Clwyd	Bridget Phillipson	Chris Leslie
Imran Hussain	Chinyelu Onwurah	Barbara Keeley	Diana Johnson	Chuka Umunna
Jeremy Corbyn	Christina Rees	Barry Gardiner	Daniel Zeichner	Elizabeth Kendall
John McDonnell	Dave Anderson	Bill Esterson	Dan Jarvis	Emma Reynolds
Jon Trickett	Dawn Butler	Catherin McKinnell	Derek Twigg	Fiona Mactaggart
Kate Osamor	David Winnick	Chris Bryant	Frank Field	Graham Jones
Kelvin Hopkins	Debbie Abrahams	Chris Matheson	Gareth Thomas	Harriet Harman
RIP Michael Meacher	Emily Thornberry	Clive Betts	George Howarth	Ian Austin
Rebecca Long-Bailer	Emma Lewell-Buck	Clive Efford	Geoffrey Robinson	Ivan Lewis
Ronnie Campbell	Vicky Foxcroft	Colleen Fletcher	Gloria de Piero	Jamie Reed
Richard Burgon	Harry Harpham	David Crausby	Graham Allen	John Woodcock
Clive Lewis	Helen Goodman	David Hanson	Hilary Benn	Luciana Berger
Rachael Maskell	Holly Lynch	Derek Twigg	Ian Murray	Margaret Hodge
	Ian Lucas	Gavin Shuker	Jo Cox	Mark Tami
	Jo Stevens	Geraint Davies	Jenny Chapman	Mary Creagh
	Kate Hollern	Gerald Jones	Joan Ryan	Melanie Onn
	Karen Buck	Gerald Kaufman	John Mann	Michael Dugher
	Karl Turner	Gisela Stuart	John Spellar	Pat McFadden
	Keir Starmer	Gordon Marsden	Jon Ashworth	Phil Wilson
	Kevin Brennan	Graham Stringer	Julie Elliott	Rachel Reeves
	Khalid Mahmood	Heidi Alexander	Kate Green	Simon Danczuk
	Liz McInnes	Helen Hayes	Keith Vaz	Rosie Winterton
	Lilian Greenwood	Helen Jones	Kerry McCarthy	Tom Blenkinsop
	Lindsay Hoyle	Huw Irrance-Davies	Kevan Jones	Sadiq Khan
	Louise Haigh	Iain Wright	Liam Byrne	Stephen Twigg
	Lisa Nandy	Jack Dromey	Louise Ellman	Siobhain McDonagh
	Marie Rimmer	Jeff Smith	Lucy Powell	Stella Creasy
	Mary Glindon	Jessica Morden	Lyn Brown	Toby Perkins
	Nick Thomas-Symonds	Jim Cunningham	Margaret Beckett	Tristram Hunt
	Owen Smith	Jim Dowd	Maria Eagle	Yvette Cooper
	Pat Glass	Jim Fitzpatrick	Meg Hillier
	Paula Sheriff	John Healey	Natascha Engel
	Rob Marris	David Lammy	Neil Coyle
	Rosie Cooper	Jon Cruddas	Richard Burden
	Rupa Huq	Judith Cummins	Ruth Smeeth
	Roberta Blackman-Woods	Julie Cooper	Rob Flello
	Sarah Champion	Kate Green	Shabana Mahmood
	Sharon Hodgson	Karin Smyth	Stephen Doughty
	Steve Rotheram	Kate Hoey	Stephen Kinnock
	Stephen Hepburn	Kevin Barron	Jess Phillips
	Sue Hayman	Madeleine Moon	Jonathan Reynolds
	Susan Elan Jones	Mark Hendrick	Steve Reed
	Teresa Pearce	Matthew Pennycook	Stephen Pound
	Tom Watson	Mike Gapes
	Valerie Vaz	Mike Kane
	Vernon Coaker	Naseem Shah
	Virenda Sharma	Nia Giffith
	Wayne David	Nic Dakin
	Yasmin Qureshi	Nick Brown
	John Cryer	Nick Smith
		Paul Blomfield
		Paul Farrelly
		Paul Flynn
		Peter Dowd
		Peter Kyle
		Ruth Cadbury
		Rushanara Ali
		Roger Godsiff
		Seema Malhotra
		Steve McCabe
		Stephen Timms
		Tulip Siddiq
		Thangham Debbonaire
		Wes Streeting
		Yvonne Fovargue