...or you could ask them what they think of the proposed extension from 8-coach 23m diesel trains to 9-coach 26m electric trains or 10-coach 26m coupled bi-mode sets? Both of which I think will be a far more common sight on most routes and services than 5-car bi-mode ones.
As far as I can tell, your assertion is incorrect. I am going from the September 2012 Modern Railways Informed Sources, where (under the heading: '
IEP▸ - signed and sealed') the planned IEP fleet makeup was published, as follows:
- 5-car bi-mode - 32 diagrams, 36 sets
- 9-car 'electric' - 18 diagrams, 21 sets
- Total 50 - 50 diagrams, 57 sets
I threw together some timetables in Excel and came up with the following rough estimates for numbers of diagrams:
Under-Wires-Service Diagrams- Oxford - Paddington (hourly) - 3 diagrams
- Cardiff - Paddington (hourly) - 5 diagrams
- Swansea - Paddington (hourly) - 6 diagrams
- Bristol - Paddington via Bath (half-hourly) - 7 diagrams
- Bristol - Paddington via Bristol Parkway (hourly) - 4 diagrams
- Total: 25 diagrams (note this means the above DfT» order is 7 'electric' units short)
Beyond-Wires-Service Diagrams- Weston Super Mare - Paddington via Brsitol Parkway (hourly) - 5 diagrams
- Cheltenham Spa - Paddington (hourly) - 5 diagrams
- Westbury - Paddington (hourly) - 4 diagrams
- Worcester - Paddington (hourly) - 5 diagrams (but some extend to Hereford, so 7 diagrams)
- Total: 21 diagrams (11 fewer than DfT have supposedly ordered, but apart from the Herefords no extensions beyond the regular service are included, since I think Carmarthens, Paigntons and Exeters might as well remain IC125 worked since other services on those routes will be.)
Grand total 46 diagrams versus DfT's 50. Assuming DfT's intentions to send IEPs to Carmarthen, Paignton and Exeter add two or three bi-mode diagrams, there's only one or two 5-car bi-mode diagrams left over to make up 10-car formations, and remember they are 7 9-car diagrams short of being able to run all the wholely under wires services with 9-car units. This probably means ALL IEP services that extend beyond the wires being 5-car throughout, with some under-wires diagrams also being 5-car bi-modes working alone.
According to Roger Ford's article in the April edition of Modern Railways, the Greater Western IEP fleet specification has been changed since last Autumn because of the decision to extend South Wales electrification to Swansea. According to RM there will now be 8 x 8-car bi-mode IEOs in the GW▸ fleet. This wwill certainly resolve some of the Cotswold Line worries as under the previous fleet proposals there would have only been 5-car IEPs in the fleet totally unsuited for peak hour Cotswold Line peak hour services currently run with often full to capacity with 8-car HSTs▸ .
If the fleet has changed to include some longer bi-modes, that'd be helpful.
I would personally say around 11 bi-mode IEP diagrams are needed, each at least 7-cars, for Westburys and Worcesters/Herefords. My opinion is the Cheltenhams and Westons should remain IC125 worked for a few years until wires can be extended to cover them, when the class 43s would be replaced with electric locos and new
DVTs‡ added on the other end.
Anyway, back to topic, who do I write to?