Yes - if the new company were taking over the line they would contact Talktalk. Virgin / Full Fibre infrastructure is not a straightforward switch, @wfm2249.
See the Ts&Cs, linked at the foot of the page, for information about the 30 day notice period.
You won't have to worry about early termination fees, but the bill will cover a couple of weeks at full price.
Keep your Direct Debit details in place until after you receive a final bill for £0.00.
It is standard for them to demand the return of equipment these days (they even sometimes ignore their own Ts&Cs about the first router being yours to keep).
None of the equipment will be any use to you after you leave, anyway, and staff can send out further prepaid returns bags if need be.
Always keep a record of the tracking number and a copy of the certificate of posting, as Talktalk goes through phases of not actually recording the returns efficiently.
Gliwmaeden2, a fellow customer.
