Swapping over to SOGEA. How long for phone to disconnect?

[#1]

I'm switching over to a SOGEA connection today and I've received a message from Plusnet a couple of hours ago to say the product change has completed. Nevertheless, my landline still has dial tone. Is this usual? How long does it take to disconnect?

[#2]

The phone line number may not be your one, sometimes a temporary number is assigned. Dial 17070 it find out.

[#3]

It still rings when I ring my number. I thought the line would go dead.

[#4]

@Annie I bet you wouldn't be able to make outgoing calls though, or actually hear anyone on an incoming one. It can take a few hours to go totally 'dead'.

[#5]

Cheers John. I'll wait a bit longer.