So I've placed an order for plusnet fibre extra. I'm currently in contract with TalkTalk fibre on full LLU. PlusNet have let me know that I can't keep my current number, which is not important as the line is only used for broadband.
At what point do I tell TalkTalk I'm leaving? My plusnet service won't go live for about 3 weeks and I don't want to be left with no broadband.
Any help would be appreciated.