BT have announced that BT RT QOS for VOIP and videocalls is likely to go live in 2012. Viatel UK have already joined this years trial.
BT RT QOS announced
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http://www.ribbit.com/bt/acqu08.php
July 29th, 2008 – Ribbit has been acquired by BT. Our mission together, is to accelerate voice innovation by empowering developers to bring customers the applications and products they will be looking for to stay in touch with their friends, family, coworkers and customers – today and well into the future.