![](https://i2-prod.birminghammail.co.uk/news/midlands-news/article29586366.ece/ALTERNATES/s1200/0_bt.jpg)
Thousands of BT customers warned they've been put at 'unacceptable risk'
BT has been fined £17.5million over a "catastrophic" failure that lasted 10 hours. Ofcom said BT was "ill-prepared" in its response to a network fault last June which lasted over 10 hours and left certain groups unable to connect to the …