Its also the case to say the benefits of electrification are most effectively extracted on 'network schemes'.
The North West scheme for instance, has included or work is underway on (and I will probably forget something), Liverpool to Manchester, Liverpool to Wigan, Preston to Blackpool, and Preston to Manchester via Bolton. This gives a whole host of electrified routes and a critical mass of units required that enable economies of scale to be obtained.
In any case, we're getting rather off topic here - this thread is for discussion of MML Electrification works - ie construction progress on Bedford to Corby. If anyone wishes to further discuss the scope of the scheme I'd request this is in an existing thread for that purpose or a new one if there is not one already available.