Erm...?
Presumably by scrapping PSTN/POTS BT are suggesting they will be able to cover the entire country with superfast stuff and I will still be able to phone me, 87 year Old, mum, who lives out in 'The Boonies', regularly at 9.00AM of a Friday to check she has not popped her cloggs and I have not scored my inheritance... without being charged 'mobile phone' data rates or having her prematurely converted to Soylent Blue Rinse. Oh, silly me. Past performance.... I assume BT will be re-branding 21CN as 22CN sometime soon.