Lets get juicy!!! (although A0wen won't like it)
Potential Bedford setups:
- Reverse at Bedford
- Change St Johns to be a larger interchange moving platforms between the 2 diverging lines
- Create Bedford Parkway near Wixams
- create a grade separated junction where EWR crosses the MML so that Thameslink services run via St Johns Interchange
Given they have chosen this corridor there is also still the possibility of going round the north of Bedford and re-joining the old rail corridor near Blunham.
I'll be interested to hear how much of the original line they use due to Blunham, Sandy, Potton, Trumpington being built on the old formation.
Personally I'd go for a dive-under tunnel (Like Hollandsche-Diep) at Trumpington and Potton, Sandy - diversion into the old platforms, Blunham - simple diversion starting here to avoid the new estate at Sandy.
So many options...... rubs hands