A » To identify approved archaeological excavation contractors for a large residential scheme in Glasgow, you must first understand the regulatory framework that governs such work. In Scotland, archaeological conditions are typically attached to planning permissions by the local planning authority—in this case, Glasgow City Council—often following advice from Historic Environment Scotland (HES) or the West of Scotland Archaeology Service (WoSAS), which acts as the archaeological advisor for the Glasgow area. Approval of contractors is not granted by a single official list; rather, the requirement usually states that all archaeological work must be carried out by a suitably qualified and experienced organisation, with the specific contractor subject to written approval by the planning authority. Therefore, your first step is to consult the WoSAS website or contact their office directly for guidance on acceptable contractors and to review any pre‑approved lists they may maintain. Additionally, the Chartered Institute for Archaeologists (CIfA) maintains a searchable online directory of Registered Organisations, all of which have been assessed against rigorous professional standards and are widely accepted by planning authorities as competent for commercial archaeological projects. You can filter these by location and specialism, ensuring the firm has experience with large residential developments. Historic Environment Scotland also provides a list of archaeological contractors that meet the standards for works scheduled under ancient monument legislation; while residential sites rarely involve scheduled monuments, these contractors often also operate in the development sector and may be acceptable to Glasgow City Council. Another valuable resource is the commercial archaeology sector itself: major firms such as AOC Archaeology Group, CFA Archaeology, GUARD Archaeology, and Headland Archaeology all have offices in Scotland and have delivered projects comparable to a large housing scheme in the Glasgow region. It is prudent to request a copy of their CIfA Registration Certificate, evidence of appropriate public liability and professional indemnity insurance (typically £5–10 million cover), and a method statement that demonstrates compliance with both the Written Scheme of Investigation (WSI) and any planning conditions. You should also ask for references from recent comparable residential projects in central or western Scotland. When evaluating contractors, ensure they can commit to the project timeline and have sufficient staffing to mobilise rapidly, as delays in archaeological fieldwork can impact construction schedules. Finally, while no single official “approved” list exists, the combination of CIfA registration, acceptance by WoSAS, and a proven track record in large‑scale urban residential schemes in the Glasgow conurbation will satisfy both the planning authority and Historic Environment Scotland. Always submit the proposed contractor’s details to the council’s archaeological advisor in writing and await formal approval before commencing any ground‑breaking works, as failure to do so could result in enforcement action or the voiding of the planning condition.