Any plan for a two-tier Premier League would be half-baked.
If the idea is to have an intermediate league between the Premier League and the Football League to close the growing divide between the two, the two-tiers of the Premier League appears to be nothing more than a re-negotiation of TV money. This could be achieved by discussions between the Premier League and the Football League, without pushing the Football League further down the hierarchy.
If the aim is to include Celtic and Rangers, then a British League would make more sense.
The reluctance to consider a British League stems at least partly from the fear that FIFA would use a British League as an excuse to force the four home nations (England, Scotland, Wales and Northern Ireland) to participate in FIFA tournaments as a single United Kingdom or Great Britain team rather than separately as they have done so historically, and continue to do so currently.
The other concern may be that sides from Wales and Northern Ireland may not be good enough. This fear can be addressed by the manner in which a British League is structured.
That UEFA “has consistently said that teams will not be allowed to play in leagues outside their own country” no longer appears to be a major obstacle.