If your broadband login isn't working, we recommend attempting to connect with a diagnostic login.
You will be unable to access the internet through the diagnostic login but it will allow a connection and give an IP to show the line and router is working.
SOHO Extreme - C&W/Vodafone
Username: firstname.lastname@example.org - or - cw_test@startup_domain
Business Pro - TTB
Talk Surf - TTB
SOHO / Business - BT Wholesale
Username: email@example.com - or - bt_test@startup_domain