There was an interesting aggregate working on Sunday night when 66605 worked a 6Z38 22:05 East Usk - Bredbury with 22 loaded HHA wagons. These had been loaded at Newport Docks on Friday, arriving as 6B55 11:24 from East Usk and departing loaded as 6H56 18:43 back to East Usk.
According to
Railways of South Wales by Adrian Kenny (published in 2010, an excellent book both for the photos and info on freight) Newport Docks has previously despatched stone to Leeds and Elstow.
It looks like this wasn't the first stone train out of Newport Docks recently - this very short article from early June has a couple of good photos of a working to Radlett being loaded:
https://railmarket.com/news/freight...ort-radlett-connection-for-aggregates-traffic
It says the stone is "high PSV" (
better skid-resistance for road-surfacing) which is quite likely to be gritstone sourced locally in South Wales.
PSV is a standard laboratory measurement of skid resistance. Many years of testing has shown that certain types of aggregate give higher values in relation to others. There is a general ranking of rock types e.g. gritstone has better PSV than basalt which is better than limestone. In the UK this natural ranking has resulted in the majority of higher trafficked roads to be surfaced using gritstone sources
https://saferroadsconference.com/wp-content/uploads/2016/05/5-WOODWARD-D-Higher-PSV-and-otherFP.pdf
Both Radlett and Bredbury are terminals owned by Tarmac, so it's probably part of the same contract. There are similar occasional workings of high-PSV stone from Coton Hill, Shrewsbury, by GBRF for Aggregate Industries (now rebranded as parent group Holcim). The stone loaded at Coton Hill comes from a nearby quarry at Haughmond Hill.
There's a list here of high PSV aggregate sources in the UK, which includes the "steelphalt" previously processed from blast furnace slag at Port Talbot by Harsco. That used to be sent by rail to Tarmac's terminals at places like Radlett, so perhaps the Newport Docks flow is a replacement of sorts - although it's not clear exactly where the stone comes from.
https://www.derbyshire.gov.uk/site-...ds/roads-traffic/aggregates-approval-list.pdf
There was also a similar flow of "steelphalt" (processed slag for use as aggregate) from the Celsa works at Tremorfa, Cardiff, to Rotherham Masborough using MEA wagons.
Does anyone have any information on this working out of Ferrybridge Power Station?
There's a photo of the working here (6M27 11:00 Ferrybridge - Brindle Heath on 4th August) with 66534 on binliner wagons. The loco had arrived as 0D27 from Leeds Midland Road.
https://www.flickr.com/photos/robstibz/54698782022/ (Photo: Rob S)
The outward working with loaded bin containers was 6E31 20:27 Brindle Heath - Ferrybridge on 1st August (loco departed as 0Z31 to Leeds Midland Road).
As mentioned in the link from geordieblue, the traffic is domestic waste for the "energy to waste" (EFW) incinerator at Ferrybridge. Brindle Heath normally sends this to another incinerator at Runcorn Folly Lane.
This short article about the original trial last year has a photo of the unloading terminal in Ferrybridge, with a substantial gantry crane:
https://railmarket.com/news/freight...aste-train-at-enfinium-s-ferrybridge-facility
I note there are a load of route learning moves from Belmont Yard to Hedon Road sidings this week - last week these were running too - perhaps this traffic is about to restart?
I hope so. It could also relate to the Tinsley to Hull steel flow. This paused for a while over the summer, with a train on July 3rd and then nothing until it ran again on 14th August (6D16 18:27 Tinsley - Hull).
The July 3rd working of 6D16 is seen here with loaded slab:
https://www.flickr.com/photos/trainsofhull/54631401913/ (Photo: trainsofhull)