Indeed. This is for Ofcom's consumption more than anything else I imagine.
I'm aware of what they want from ISPs as far as partnership goes - they are looking for 'anchor tenants'. Operators that will commit to moving customers from copper-based solutions to FTTP, very much a 'Bring them and we will build it.' scenario where ISPs and Openreach agree something akin to FTTPoD deployments, but with native FTTP being sold, and operators migrate their customers served by the OLT ports off xDSL technologies and onto the FTTP. This time around, due in no small part to how effective LLU has been at taking market share from BT Wholesale, BT Retail would not be enough of an anchor tenant for Wholesale, and Wholesale in turn for Openreach. They need at least Wholesale and A N Other large provider on board.
Obviously the trouble is TalkTalk are still deploying ADSL. Sky are pretty attached to their copper assets too, Vodafone perhaps less so.
The choice for Ofcom is a simple one - do they keep pandering to LLU operators, it's them that are addicted to copper far more than Openreach are, or do they accept the need to follow the Japanese, and other, examples where every ISP and their dog is purchasing FTTP from NTT. In Japan indeed most are quite aware they are having their services delivered by NTT - they are paying NTT for the FTTP 'line rental' and a service provider charge on top.
Anyone else remember how late Sky and TalkTalk were to FTTC? Did everything they could to cause grief for Openreach and resisted offering it for the longest time to sweat their exchange-based MSANs. They've already essentially blocked LR-VDSL by complaining and lobbying Ofcom quite aggressively for fear of stranding their copper equipment.