43096
On Moderation
- Joined
- 23 Nov 2015
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- 15,366
In basic terms the 30 707s replace 30 458s on the Windsor/Hounslow/Weybridge services, with the 458s going to the Reading line. Given that there's only 24 units required for the entire peak Reading service, and 32 458s diagrammed daily, there is evidently going to be some use of 458s elsewhere.It's always been the plan to use them to Weybridge. The term Windsor lines includes the Hounslow loop and the Chertsey line.
By my calcs 4tph to Windsor with all trains 10 cars would require 20 units. However, even with the current frequencies there won't be enough units to go round so expect some diagrams to remain as 458/5 and consequently some Reading diagrams to remain as 450. I recall this was confirmed either on this thread or a related one.
I wouldn't start thinking about the 4tph Windsor service in terms of the currently ordered 707s. It's a franchise requirement so will be linked in with whatever stock strategy the incoming franchisee has. Given the apparent need to prematurely replace the 455/456 fleet due to station dwell time requirements, I would expect a big order for new units in the new franchise, probably of 100+ 5-car units, of which 90 or so to replace the 455/456s and another 10 for the 4tph Windsor service. Obviously it would make a lot of sense to take more 707s to give a common fleet.