Router change

[#1]

Upgrading from Adsl2 to fibre on Tuesday ..... Is it worth plugging the hub one in early or wait until im switched over ?

Router just pick up the fibre change over ?

Any advice would be greatly appreciated 

[#2]

You can plug the hub one in. It will drop the connection once the engineer has done his work in the local cabinet.
The hub one works with both ADSL and VDSL.