[2] Tillison played on several of these albums, while special guests have included Martin Orford (IQ), Ian 'Walter' Fairbairn (Hedgehog Pie & Jack the Lad), Stephen Dundon (Molly Bloom), Leon Camfield (Tinyfish), Marek Arnold (Seven Steps to the Green Door, Toxic Smile & Cyril), Chloe Herington (Knifeworld), Hugh Whittaker (The Housemartins), John Young (Lifesigns, John Young Band, Asia, Scorpions, Bonnie Tyler & more), Phideaux and Angela Gordon (Mostly Autumn).

Manning and Tillison also teamed up as fictional Italian band La Voce Del Vento to provide two long pieces for the Colossus Project Discs (The Spaghetti Epics #1 and #2).

Other guest contributors have been Nick Magnus, Brody Thomas Green (Southern Empire), Cam Blokland (Southern Empire), Antonio Vittozzi (ex-Soul Secret), DavidB, Phideaux, Luke Machin (Maschine, Francis Dunnery, The Tangent, Kiama), Jonathan Barrett (The Tangent), Nick Sinclair, Ulf Reinhardt (Seven Steps to the Green Door), Tim Irrgang (UPF), Stephen Dundon (Molly Bloom), Julie King, Chris Catling, Kevin Currie, the Sanducci Horns, Raf Azaria (UPF), Tzan Niko, Amanda Timms, The Gospel Collective & Jones Commentary.

The band debuted live on 2 October 2016 at Summers End Festival with the line-up announced 09/09/2016 of Guy Manning, Marek Arnold, Dan Mash, Sean Timms with Special Guests: Luke Machin and Henry Rogers.

Musical Friends/collaborators include: Simon Godfrey (Tribe of Names, Shineback, Tinyfish), Marek Arnold (Seven Steps to the Green Door, Cyril, ArtProject), Jon Axon (Genius The Fool), Joe Cairney (Comedy of Errors), Huw Lloyd-Jones & Simon Rogers (Also Eden), Phil Stuckley (Stuckfish), Phideaux Xavier & Ariel Farber (Phideaux), John Southerden, Julie King, Kevin Currie Damanek colleague Marek Arnold asked Manning to compose the majority of lyrics for Cyril's 2016 "Paralyzed" album.

On 31 March 2014, a new band was formally announced, led by Mark 'Truey' Trueack, Matt Williams, Tim Irrgang and David Hopgood (ex-members of Unitopia) plus involving Guy Manning, Marek Arnold and Dan Mash (all from Damanek).

This initial line-up included Manning and Sam Baine plus Roine Stolt, Jonas Reingold and Zoltan Csorsz from The Flower Kings, and David Jackson from Van der Graaf Generator.

Other later Tangent members have included Theo Travis, Jaime Salazar, Krister Jonsson, Jakko Jakszyk, Jonathan Barrett, Luke Machin, Daniel Mash, Steve Roberts and Tony Latham.

On 11 May 2010, a statement appeared on the Guy Manning website indicating that he would no longer be partaking in any future Tangent activities, although he has provided Acoustic Guitar [cameo only] for 2013's "Le Sacre du Travail".