For Cambridge services, this means a huge reduction in Standard Class seating at peak time. Current 365 12 car formations have something like 717 Standard class seats. So a 2*5 car IEP will have only 500. In 1st class, 12 car 365 gives 72 seats, versus an increase to 118 for a 2*5 IEP.Under the current specification, which looks like it might be re-assessed again, a 5-car IEP train will have 59 first class seats and 250 standard class seats,
Not great in commuter terms...