With 50Mbs someone is not going to be downloading from one server, they are going to be downloading 10 Linux distro's from 10 different servers at the same time, so the upload speed is going to have to be enough to cope, otherwise it will have to be advertised as "Up to 50Mbs", not got the same ring to it somehow, has it.
Then there is the family of six, all downloading, yes, we are going have to demand that ntl make the upload speed 10Mbs at the very minimum.
On the workfront positive side, ntl is going to have to increase the number of staff in the "Sending letters out" dept. due to everyone going over the monthly cap on an hourly basis.