^^^ The 'mobile' URL for The AnswerBank (i.e. the one that started with 'm.') was discontinued several years ago, Wolfie. (The late Woodelf used to use that address on his PC, as it was much easier for his screen reader to cope with. He had all sorts of problems when it no longer worked).
The AnswerBank now has the same URL across all three versions of the site. (i.e. the desktop, tablet and phone ones). AB's server detects the type of device that the request is coming from and then sends out the appropriate version of the site to it.