The post you are reporting:
By my count the current list of MPs of whatever colour stepping down is as follows
Conservative 32:
Henry Bellingham, Richard Benyon, Alistair Burt, Glyn Davies, Mims Davies, Alan Duncan, Michael Fallon, Mark Field, Bill Grant, Richard Harrington, Peter Heaton-Jones, Nick Herbert, Nick Hurd, Margot James, Jo Johnson, David Jones, Seema Kennedy, Mark Lancaster, Jeremy LeFroy, David Lidington, Patrick McLoughlin, Nicky Morgan, Sarah Newton, Claire Perry, Mark Prisk, Keith Simpson, Nicholas Soames, Caroline Spelman, Hugo Swire, Ross Thomson, David Tredinnick, Ed Vazey,
Independent (ex Conservative) 8
Guto Bebb, Alistair Burt, Ken Clarke, Philip Hammond, Justine Greening, Oliver Letwin, Amber Rudd, Rory Stewart,
Other 2;
Nick Boles, Independent Progressive Conservative
John Bercow, Speaker,
Labour 20:
Adrian Bailey, Kevin Barron, Roberta Blackman-Woods, Ronnie Campbell, Jim Cunningham, Ann Clwyd, Gloria De Piero, Paul Farrelly, Jim Fitzpatrick, Kate Hoey, Helen Jones, Ian Lucas, John Mann, Albert Owen, Teresa Pearce, Stephen Pound, Geoffrey Robinson, Owen Smith, Stephen Twigg, Tom Watson,
Independent (ex Labour) 5
Ian Austin, Louise Ellman. Kelvin Hopkins, Jared O'Mara, John Wildcock
Liberal Democrats 3:
Norman Lamb, Vince Cable, Heidi Allen,
Other 4;
Joan Ryan, Ann Coffey - The Independent Group For Change,
David Simpson - DUP
Sylvia Hernon - Independent
so that is 74 and counting