[qasdfdsaq]

4.5gbps DOCSIS is not viable in the UK with the current network design and contention ratios. Whether it will ever be remains to be seen but I highly doubt it. 1 Gbps over a 4.5G channel might just be passable but still would require hugely expensive overbuilds and pushing 10-100g fibre so deep into the network that you might as well build a new pure fibre network.