Britbikefreak,
I am another one with the chrome coming off and rust (after 6-7 months) BOTH under the bracket and near the header pipes, only in my case they are quite visible (in fact quite nasty).
I would also be interested to see the TB warranty policy on here since you didn't get any e-mail response from TB.
I was hoping Graeme would chime in here since this thread has been up for a week now.