For GWR▸ :
- Hourly service between London Paddington and Plymouth. These will all run non-stop between Taunton and Reading. The stations at Castle Cary and Westbury, along with the intermediate stations between Westbury and Reading, will be served every 2 hours by Class 802s.
Sounds about right, I believe the plan is for the 5 car 802s to form 10 coach trains on the Pad to Plym direct services, and 9 car 802s to run Pad to Exeter via Westbury, with extensions to Plymouth or Paignton depending on the time of day.