When a company has 700 suppliers from a hairdresser to a major construction company with a £750m building program on their site, and they want their Scope-3 done properly - interested to know how everyone would plan the delivery. The supply chain scope 1 and 2 is an easy 2 day job, but the materiality and uncertainty across the different industries is the juggling act. Interested to hear people’s logic path if different to 1) identify 80% of spend 2) identify highest level of certainty, and work downwards.
All alternatives will be interesting 
Happy to think with you on this one.
Just to be sure, you also see 1) and 2) as a valid starting, right?
Absolutely - start with the easy parts, just make sure clients actually have the valid REGO details (not just a pretty certificate from the supplier). Us having access to metered data from every MPAN and MPR in UK also helps