I'm just theorising now, and let's see what anyone else thinks.
That might (probably wrongly) have caused it. If they ported the phone first, (before they "migrated" the broadband), then that would cease the Plusnet broadband immediately. Hence the broadband cease fee. Then whatever process is required to get the FTTP up followed on as a straight provide.
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
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