Cross city line
Firstly the order of Aventras to replace the 323 would be for fixed formation 6 car units.
Secondly I would build a new route from Aston to Five Ways. Initially it would follow the route of the long closed LNWR Windsor Street Goods branch for around a mile before tunneling under the city centre with new underground stations at Aston University and Birmingham New Street low level. From there the route would emerge above ground at a point between New Street and Five Ways on the trackbed of the Midland Granville Street goods branch with a new Five Ways station being built immediately to the east of the current one with platforms extending under Islington Row middleway. The 3 new stations would be built with the possibility of a future upgrade to 10 car trains in mind.
Chiltern Main Line, Birmingham Metro, Birmingham Hub and other improvements

Key to the success of the project is a four-track main line from South Ruislip to Birmingham Snow Hill. The route from Paddington (with less trains as most will transfer to Crossrail) will be used; with up to 8tph from Paddington using Pendolino-style tilting electric stock. With a call at Old Oak Common, it would go up the New North line. Local trains from Marylebone would go as far as High Wycombe with additional trains able to operate from Marylebone to places like Banbury and Stratford on Avon.
Services from London would use this new route to Birmingham instead of the West Coast Main Line with 4tph calling Old Oak, Solihull (for Birmingham Airport) and Moor Street; with 2tph continuing to Wolverhampton using the new link in red at Smethwick Galton Bridge. Cross Country services would all operate via Solihull as well. 2tph would terminate at Moor Street and have extra calls at Banbury, Leamington Spa, Warwick Parkway and Warwick. The final 2tph would operate to Oxford via Bicester Village; with the high-level of Intercity service removing 2tph from the GWML / re-purposing the paths as far as Reading.
Metro services from Leamington Spa, Dorridge and Stratford on Avon (all electrified) via Solihull would operate along the Smethwick connection to go to Wolverhampton and also to Shrewsbury (electrified).
Services from New Street (and therefore from Coventry, International and from Leamington via Kenilworth) would operate down to Rowley Regis, Kidderminster etc.
Cross City services continue as now; due to the lower demand for services along the corridor via International, re-modelling would enable more Intercity services from the Derby and Coleshill direction to run down into the low-number platforms as well.
There wouldn't be much of a need to do anything to the Camp Hill line. All Cross Country services (hourly Bournemouth and hourly Southampton extra) would route towards the North West via Wolves; all from the West Country (Plymouth and a service from Cardiff) would run to Edinburgh and Newcastle on a 'plain line' via University and Landor Street.
An additional Cross Country service from Temple Meads would pick up calls at Worcester Shrub Hill and Bromsgrove (and University). This would run through to Nottingham. The Hereford service would operate to Lincoln Central (as a mostly fast service from Nottingham via Newark Castle to Lincoln with positive new connections).
Two trains an hour would operate from Euston (using Pendolinos); with an additional two fast 350s per hour from Euston via Northampton. The remaining 2tph from Coventry to New Street would originate at Leamington via Kenilworth. The two 'slow' 350s per hour from London via Northampton would run from Coventry up to Nuneaton and terminate.
I believe this would sort out a whole host of the biggest capacity problems; some services might operate from the Moor Street area towards Kidderminster; a few services would run from New Street towards Wolves.
General service frequency similar to:
- 2tph Paddington to Wolverhampton (CH)
- 2tph Paddington to Moor Street (CH)
- 2tph Paddington to Moor Street (with stops) (CH)
- 1tph Bournemouth to Manchester Piccadilly (XC)
- 1tph Southampton Central to Liverpool Lime Street (XC)
- 1tph Plymouth to Newcastle (XC)
- 1tph Cardiff Central to Edinburgh (XC)
- 1tph Bristol Temple Meads to Nottingham (XC)
- 1tph Hereford to Lincoln Central (WM/EM)
- 2tph Leamington Spa to Wolverhampton (WM)
- 2tph Dorridge to Shrewsbury (WM)
- 1tph Stratford on Avon to Crewe via Stoke on Trent (WM)
- 1tph Stratford on Avon to Preston via Crewe (WM)
- 1tph Whitlocks End to Worcester Shrub Hill (WM)
- 1tph Whitlocks End to Great Malvern (WM)
- 1tph Birmingham International to Manchester Piccadilly (XC)
- 1tph Birmingham International to Liverpool Lime Street (XC)
- 2tph Euston to Birmingham New Street (VT)
- 2tph Leamington Spa to Stourbridge Jn (WM)
- 2tph Euston to Kidderminster (WM)
- 2tph Rugeley Trent Valley to Stourbridge Jn via New Street (WM)
- 2tph Euston to Nuneaton (WM)
- 4tph Lichfield (City / Trent Valley) to Bromsgrove (WM)
- 2tph Walsall to Redditch (WM)
- 2tph Four Oaks to Redditch (WM)
- 1tph Birmingham New Street to Cambridge (EM)
- 1tph Birmingham New Street to Nottingham (EM) (Combines existing Leicester and also Leicester to Nottingham stopper on Ivanhoe)
Plus whatever other services are needed that I've forgotten...!