if you want broadband only, then its services like Virgin Media cable
VM will charge you a different price if you don't take their phone line.
e.g. 30meg VM Broadband without phone is £22.50/month (first 3 months at £17.50)
but if you take a phone line (£14.99/month), the broadband price is only £14/month, a saving of £8.50 - so really the price of the phone line is £6.49/month.
James BT Infinity 2 19/09/2012 - Speeds ~46 / ~8.5 Mbps - Sync 48.9 / 10 Mbps @ 470m
Huawei modem -> Draytek 2820 -> Airport Extreme -> Switch -> Windows/Mac/Linux/NAS/Phone/TV
13 years of broadband - 1999 ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(19M/16M)/BT FTTC(46M)