@itguru normally, as @Dan_the_Van detailed, when you transfer a copper line based service e.g FTTC , the new ISP will transfer both the phone and broadband and thus the old ISP services will be automatically ceased and the account will be closed.
With a move to Plusnet FF , unless you selected the 'keep my existing services' when placing the order, then as I understand it, Plusnet will still cease the old landline by placing a 'change of ownership cease'. So this should still automatically cancel your existing services.
If you've selected 'keep my existing services', then you will need to contact Vodafone directly (after your FF is installed) to cancel any existing phone & broadband.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
