When I got the email to say I got the job I didn't get told what role I had, so emailed back and asked and was told BCD which I understand is pretty good to do. However, I'm not 100% certain as this was just email from a BT recruitment advisor and I have no paper work to confirm this.
I know you tend to find out on your first day of training.... have to wait and see
Please note these are my own thoughts and opinions!