I've just phoned them to ask about transferring my mortgage when I move.

Despite their letter to me and their web site saying:
"We're pleased to let you know we can now offer all the features associated with your mortgage. Subject to our lending policy at the time of your request, you'll be able to... ...Take your mortgage with you if you move home – regardless of whether you increase your loan amount or not"

and

"What happens if I am planning to move home, can I take my Intelligent Finance mortgage with me?
Yes. You can take your Intelligent Finance mortgage with you."

they have just told me that only people in their discount period can take their mortgage, and as I'm on the SVR I cannot.

What a pile of...