To all posters. Starting here because it has been quoted so many times in the thread.

In reply to a post by professor973:

There are exceptions Bob. TT and Sky have unbundled my exchange a few years back and still Market A. https://www.samknows.com/broadband/exchange/EAGLE

Market A in fact covers exchanges with two Principal Operators, so presumably at the time the allocations were made only one of those two was present as well as BT Wholesale.

Nothing will change until the next review if there is one, or until Ofcom decide to do periodic updates based on changes since the list was drawn up (2013) and came into force (2014). Something they have never done previously.

The difference between the old Market 1 and Market A is that Market 1 was specifically BT Wholesale only. Market A any exchange with fewer than three Principal Operators at the time of finalising the list.

It's a pity samknows still haven't updated their "Ofcom" classifications