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Starting at STU the first London frequency is 129.375. As the aircraft move Eastbound they may, traffic levels permitting, be transferred to 133.6. As they begin descending towards FL270 they will be transferred to 134.75 (as they leave Wales!) On passing abeam Lyneham terminal control will take over on 134.12.
If entering via LND the first (and largest) sector will be 132.95, again traffic levels permitting this sector can be split so aircraft may be transferred (around the Plymouth area) to 126.07. Generally this sector will issue an initial descent restriction and, whilst in the vicinity of Lyme Bay, will hand off to 129.42 who will, most of the time, keep the aircraft till passing control to terminal control, again on 134.12 between Southampton and Petersfield.