Switching from LLU FTTC to another provider?

Hi

I am with Sky FTTC and I was trying to switch to another ISP. I found that through online checker of the potential ISPs, they all say I cannot get FTTC when I put in my phone line. I think that's because I am on LLU. So how exactly do I switch provider int he most time efficient and cost effective way? Disconnecting and reconnecting the line will incur downtime and cost for example.

Thanks

You order based on your full address and they should have their systems set-up in such a way to realise that full LLU telephone line numbers don't work with the BT Wholesale checker.