Norwich to Cambridge already needs 2 tph really and could easily fill both at times and that'll only increase as some stations in line for thousands of new homes. Attleborough to give one example is almost doubling in size with thousands of homes given outline approval south of the station.I think it will happen as there now is so mamy green initiatives that can happen without it, more freight by rail out of Felixstowe, more passengers going to be pushed to rail once again as the government is looking to raise money in the budget so motorists will be hit.
Forgetting the fact Ipswich to Cambridge and Peterborough needs more frequent services, there will come a point Norwich to Cambridge will want half hourly especially when east west rail opens.
Like much else in the UK it's taking an age to build but it will happen.
Start date revealed for work on 4,000 new homes which will double size of town
Work on a major 4,000-home development which would double the population of Attleborough is to begin next summer.