Holcim UK has moved nearly 20,000 tonnes of aggregates by rail from its Bardon Hill quarry in Leicestershire to the Port of Sunderland since June, targeting 100,000 tonnes in the route's first full year.

The new weekly service, run in cooperation with GB Railfreight, consists of 19-wagon trains carrying approximately 1,425 tonnes each. Fourteen trains have operated so far. To hit 100,000 tonnes Holcim needs roughly 70 trainloads at the present payload, so frequency will have to rise above the current one-per-week cadence.

The aggregates feed asphalt production at Northumbrian Roads and Hulands Asphalt in North East England, replacing tonnage that Holcim previously handled through the Port of Tyne. Holcim has not disclosed which "changing supply arrangements" at Tyne triggered the switch.

Why Sunderland instead of Tyne?

The Port of Sunderland offered three things Holcim could not match elsewhere: 6,000 tonnes of aggregate storage, an existing railhead, and handling equipment able to discharge open box wagons without major new investment. Road haulage of the same volumes was not commercially realistic, and shipping depended on vessel size, material source and available port capacity. Open box wagons require more manual handling than automated bottom-discharge types, but they avoid the capex of dedicated unloading infrastructure.

"Railheads and wagons carry fixed costs, so the more volume you can move through them, the stronger the economics become," said Damien Preece, General Manager – Rail at Holcim UK.

The economics matter because Holcim is already a committed rail customer. In December 2024, GB Railfreight extended a four-year aggregates haulage contract covering Bardon Hill and the Isle of Grain in Kent. The Sunderland service adds load to wagons Holcim already pays for, while pulling extra traffic through a port railhead that had spare capacity.

What supply change forced the switch?

Mustapha Nyass, Regional Operations Manager at Holcim UK, framed the decision as a response to disrupted upstream logistics rather than a strategic shift toward rail. "We faced a real supply challenge, but the answer was not simply to absorb higher costs or accept less flexibility," he said. "By using Sunderland's railhead, storage space and port capability, we have created a practical new route that supports local construction, strengthens our asphalt operations and gives us room to grow when demand increases."

For Northumbrian Roads and Hulands Asphalt, the practical consequence is a more local aggregates supply, with material arriving in 1,425-tonne drops rather than the smaller payloads typical of road delivery. For regional shippers and forwarders, the route is a single-customer case study rather than a general capacity release. If demand softens or Tyne's supply position improves, the economics that justify the new path weaken quickly — a risk that hangs over any modal-shift project that relies on one buyer's contract.

Does government policy match the demand?

The service launched weeks after the UK government set an interim target of 40% rail freight growth by 2040, with a longer-term ambition of 75% by 2050. The Department for Transport estimates construction freight could grow 45% by 2040 — a volume ministers expect to absorb through modal shift rather than new road building. Aggregate flows into major road and housing projects sit at the centre of that forecast.

The September announcement carried no new funding. Great British Railways will receive a statutory duty to promote rail freight growth, and a longer-term rail strategy is expected from autumn 2027. For now, modal shift in aggregates depends on shippers such as Holcim underwriting the fixed cost of wagons and railheads on routes where ports can spare handling capacity.

Whether the Sunderland service scales past its first-year target will rest on the rhythm of construction demand in North East England and on whether Holcim lifts train frequency beyond the current weekly run. With the four-year GB Railfreight contract extension already in place and a national growth mandate waiting in policy, the route has a defined tailwind — provided Tyne's supply constraints hold and port capacity in Sunderland remains available through the rest of the decade.