A release issued by the Environmental Investigation Agency
( Endangered wood used on Beetham Towers, claims watchdog ) claimed that Ian Simpson Architects' 301 Deansgate project in Manchester and the firm's Holloway Circus scheme in Birmingham had used illegally-logged timber from New Guinea.
The report stated that both towers used 'dark red merbau wood' found in the Pacific island's tropical rainforest, but the Beetham Organisation has denied any such claims.
A statement issued by the group said: 'Beetham Organisation employed construction contractor, Carillion, at 301 Deansgate, Manchester, which has a Responsible Timber Procurement Policy, which states that all timber is to be procured from legal and sustainable sources.
'When wood was procured for 301 Deansgate, Carillion received certificates of legality for the timber from its supplier.'
The statement continues: 'Carillion is a member of WWF Forest and Trade Network and works closely with them to ensure that its procurement policy is sound.
'WWF Forest and Trade Network rigorously audit Carillion's processes. This policy is also applied to timber procured through Carillion's supply chain.'