Would not be surprised if this was an idea at the moment rather then a fact,vm have to stm their own broadband customers at present,ie me and thousands of others what would happen if they were to flog access to everyone on a wholesale basis.
And i do not think the regulator would make them open up the cable network as the network was financed entirely out of private capital,unlike bts which had millions of taxpayers £sssss, pumped in under its guise as a former nationalised giant. I would say its vm at best fishing around in desperation (hope not), at ways of paying off its huge deficit,if it does go ahead (hope not) lets hope its cable base customers do not suffer (unlikely) as it sounds like bad news.