Foster and Partners, Zaha Hadid, Richard Rogers and Chipperfield are among the biggest omissions on a list of more than 450 names which have agreed to sign up to the student body's worthwhile campaign.
Bonnie Chu, former co-chair of Archaos, has been leading the campaign for some time and says that the chief aim is to have every practice in the country signed up to the cause.
Although the likes of Zaha Hadid, Foster and Partners and Chipperfield have not put their names to the list, Chu says it does not mean that they have opted out: 'Some practices may not have received our letter, or may not have had time to respond.
'We are currently in talks with Zaha Hadid, and we hope the situation is to be resolved soon. We are, however, delighted to have more than 450 practices signed up.'
Those that have committed themselves to the campaign include BDP, HOK, Assael and Sheppard Robson.
If any practice has not received a letter and would like to sign up to Archaos' good practice campaign, visit www.archaos.org/gpc for more information.