You/we need a vision for what kind or reach and range all or specifics we wish for in 'freight by rail'. Is there environmental gains sending more freight by rail? Government seems to cordon type of freight x a cap on freight for passenger and speed than new/reopened rail for medium-longer haul capacity flows.
I'm afraid that some are so narrow in heavenly mindedness, they forget the hands-on upwards which creates bread!
The market alone will just go for pop and the easiest structure - roads unless made to/incentivised to consider water and/or rail. E.g. a pre-planning requirement of Blisworth should be they invest in Northampton-Brackmills-Bedford and a recycling depot, likewise the proposed incinerator at Millbrook, Central Bedfordshire, adjacent to the Marston Vale Railway should as a pre-planning requirement be ordered to bring in/make arrangements for bringing in waste by rail and taking the ash/burnt material out by rail. Whatever the qualms on 'smoke'; unless the recycling is bulk-rail enough to volume-ise for aggregate justification of tonnage - you have an army of lorries masquerading behind 'local distribution' and often the unions! Government could do more to sort the frameworks out to encourage pro-rail compliance as a pre-plan thought than addendum to colourise a lorry fleet mecca on an outline plan.
A niche I believe a campaign could work on is the 3 R's: Renewables, Recycling and Rail as a triangulated unit. Bulk requires Regional scale of operation but you could have regional hubs like Forders Sidings, Wolverton and Brackmills around a triangulated rail network bestriding 3 regions and multiplex warehouse, logistics and distribution hubs Bedford, Milton Keynes and Northampton are. How we get from a to b, is the key and challenge. Conversely if the tracks aren't there, if business has no incentive, even outside our area to it, it falls down and new depots off main lines minus the Northampton-Bedford missing link, just means capacity on the WCML has to give in passenger or other customer terms.