BT charging me for joining Plusnet!!!!

[#1]

I have a text message from BT telling me they will charge me £146.89 to leave them and join Plusnet!!!!

Is this the norm,

[#2]

I suspect the fee is for buying out the remainder of your BT contract (if you're not still in contract, I haven't a clue!)

[#3]

Sounds like what @JayG just said.

Are you still under a contract? If you're not sure I would ring BT up and ask what the charge is for.