When you order, you choose a BT email address and password. They send you emails confirming the order etc. to this address.
I logged in to my existing BT account (for phone line) when I placed my order. All the information about my order, including the new email address and password I selected, were sent to my existing BT account email address. Exactly where I wanted them. I'm ignoring the BT email account.
No you can use your own router.
The engineer will fit and install both the openreach modem and the BT homehub - but as soon as he leaves you can unplug the ethernet cable from the HomeHub and plug in your own. Don't forget it needs an ethernet WAN port and to do PPPoE.
For the residential service there's no password and the username is email@example.com.
Concur - that's all I set in my Draytek 2820. Some routers complain about blank passwords which is where people have used spaces etc. I gather you can use your BT email address and password as well, but I've not tried this.
Full speed 24*7.
James BT Infinity 2 - 19/9/2012 - Install-sync: 52/12 - Test: 50/10 - Est: 44.6/6.5 Mbps
13 years of broadband - ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(16M)/BT FTTC(50M)