Not been confirmed yet. As to the quest for an ISP with decent, consistant upload speeds...... good luck. No matter what ISP you go with you will need to control the bandwidth in use within your side of the network to be able to maximise your gaming pings. Any traffic going through your ISP connection will seriously hamper the ping times. Look at some of the ADSL providers as that is the only way you will get decent upload speeds better than NTL/ TW but since it is ADSL you will need to be sure you can get a decent speed in the first place and you will need to be sure of the contention ratio in your area.
You could try
Be but you need to figure in line rental, another provider for TV etc.