Having gone to the trouble and expense of building the Ipswich North Curve, I'm somewhat surprised that any non-London freight is routed via London.
The main benefit of the 'Bacon' curve at Ipswich has been to allow trains running between Felixstowe and
Leeds/Doncaster/Tees Dock/Wakefield/Rotherham (i.e trains which were routed via Ely in the first place)
to access the GEML towards Stowmarket directly, without having to reverse in Ipswich yard. In addition
it is also a huge help when the route via London is closed at weekends because of engineering work,
as is the case for the next three weekends!
Unfortunately, due to capacity constraints in the Soham/Ely area, plus long signalling block sections between
Manea and Whittlesea, there is little scope for the mass rerouting of weekday Freightliner services to Crewe,
Trafford Park, Ditton, Lawley Street, etc. via Ely for a few years yet...
MARK