The 50 high-sided JNA bogie boxes are in regular use, currently formed into three sets working bulk ballast flows from Ravenstruther to Carlisle, Stud Farm to Bescot and Mountsorrel to Eastleigh.
Seen here on 6M26 Eastleigh - Mountsorrel:
https://www.flickr.com/photos/154351395@N07/52000505765/
Side view of Wascosa JNA, at Saarbrucken, on delivery to the UK:
https://www.flickr.com/photos/152684342@N06/51631609162/
*
The first 110 of the 260 MLA low sided bogie boxes have gone into use, mixed among the rest of the existing "falcon" fleet. These are used on engineering possession work, usually loaded with ballast or spoil (and sometimes with scrap rail or used sleepers). Another batch of 30 of these wagons was delivered from Dollands Moor to Wembley yard on Saturday 9th July, running as a 6Z67.
These were then moved to Eastleigh as a 4O00 on 13th July behind 66789 -
https://www.flickr.com/photos/154351395@N07/52214332194/
This photo at Eastleigh shows older falcons (left) vs the newly delivered Wascosa variant -
https://www.flickr.com/photos/64657021@N07/51956283324/
Side view of Wascosa MLA at Eastleigh:
https://www.flickr.com/photos/davekirwinphotography/51863399346/
Some coalfish disposals have already started after this influx of new wagons, for instance 15 coalfish were sent from Toton to Attercliffe for scrap on 25 May. There was also some discussion in the previous thread about the fate of the Sidetipper wagons - some news on those on the LTSV website in an update of 4 July:
https://www.ltsv.com/rd/news.php
Back to the Wascosa fleet:
New Wascosa FEAs have been coming through the channel tunnel, in batches of 20, on various dates throughout the year so far. These are standard container flats which can be fitted with different types of module which are mounted like 20ft containers, e.g. an FEA "salmon" has three flat-deck modules on it.
https://www.railjournal.com/fleet/wascosa-unveils-network-rail-wagon-fleet/
To carry other infrastructure materials on the 60ft (18.3m) FEA wagons with Y33 bogies, GBRf has ordered 260 bodies of three types: a flat module for carrying track panels and sleepers; a second design with drop sides for carrying switches and rail; and a unit equipped with bolsters and stanchions for carrying rail.
Some of the FEAs have been delivered without any modules and have gone into use as standard container flats on intermodal traffic with GBRF, as noted in the previous thread.
Pics of Wascosa FEAs on intermodal traffic:
https://www.47soton.co.uk/2022/02/new-wascosa-fea-w-wagons-at-eastleigh.html
However, a large number of the FEAs have arrived with flat deck "salmon" modules already fitted. If you search for "New Wascosa FEAs 6Z66" on Youtube there is various footage of these wagons being delivered, usually running as a 6Z66 Dollands Moor - Eastleigh. This was one exception to the 6Z66 headcode; a 6Y71 filmed here at Purley Oaks, with 69004 and 73965 on a train of FEAs with "salmon" modules -
Channel: All About Trains | Video: 69004 / 73965 6Y71 Dollands Moor -Eastleigh 20th Feb 2022
If you pause the video at 1:09, the white "teeth" along the side of the modules are revealed to be the fittings for strapping loads of track panels or sleepers. You can see how the decks are mounted, like containers, and there seems to be a kind of "bridging plate" between each 20ft module to avoid gaps in the deck in the middle of the wagon.
The first loading of the flat-deck "salmon" FEAs was at the new concrete sleeper works at Halling, mentioned in this post in the Rail Freight News thread:
https://www.railforums.co.uk/threads/rail-freight-flows-and-news-uk.195217/page-27#post-5737142
After the wagons moved empty from Eastleigh to Hoo Junction and then to Halling, the first loaded train of sleepers departed on 29th June as a 6Z85 13:40 Halling to Hoo Junction, running via Tonbridge, Orpington and Sidcup, presumably due to the lack of a crossover at Halling. The loaded wagons were despatched to Westbury and Hinksey, on the usual network trips via Eastleigh, and the sleepers were used on a major multi-day possession site at Severn Tunnel Junction at the beginning of July. There was also another rake of FEA salmons used at Severn Tunnel which arrived and departed empty, but I understand it was used to move recovered track panels around on site.
6Z85 en-route from Halling:
https://www.flickr.com/photos/136510631@N08/52181997766/
FEA loaded with sleepers on 6Z85:
https://www.flickr.com/photos/60854097@N06/52182267728/
Empty FEA salmons passing Romsey:
https://www.47soton.co.uk/2022/07/new-fea-w-wagons-to-westbury-romsey.html
A train of 18 empty FEA salmons reached Doncaster on 3rd June, via the Eastleigh to Scunthorpe and Scunthorpe to Doncaster infrastructure trips (which would normally convey rails from Scunthorpe). These wagons didn't move for over a month, remaining on the "Up Goods 3" reception road in Up Decoy, clearly visible from passing trains. Six of these wagons have now been shunted onto a siding in the adjacent Doncaster Wood Yard which is used for loading new track panels, and perhaps some of the others will eventually be loaded with sleepers at the concrete sleeper factory, also in the Wood Yard.
*
There are two other types of modules for the FEAs, as mentioned earlier; a "Tench" or "Super Tench" (not sure what the fishname will be) with mesh sides for general materials, and a bogie bolster for rails. I think only one of each had appeared in the UK until very recently, both arriving together on a 6Z66 from Dollands Moor to Eastleigh back on 29 January - if you search there is a video of this service on Youtube where they flash past in the middle of a consist of salmons.
The tench, with its mesh drop sides, can be seen here at Eastleigh:
https://www.47soton.co.uk/2022/07/miscellany-at-eastleigh-27th-june-2022.html
A full rake of FEA "tench" ran from Dollands Moor to Hoo Junction as a 4Z66 on 28 June, then to Tonbridge the following day as 4Z34, finally reaching Eastleigh as a 4Y68 on 6th July behind a pair of 73s:
https://www.flickr.com/photos/188130675@N02/52196822497/
*
There was a Wascosa media event at London Victoria on 28th June. GBRF 66s top & tailed a demonstration train from Eastleigh to Victoria and back (via Reading and Acton) featuring each variant of the Wascosa wagons, running out as a 4Z98 and back as a 4Z99. The bogie bolster variant (equivalent to a YLA borail "mullet" although I'm not sure what they are calling the FEA version) can be seen in the formation:
https://www.flickr.com/photos/93293618@N05/52180241363/
Nice footage of 4Z98 passing West Drayton, with a good view of all the wagons:
Channel: Flyin9 Scotsman | Video: Newly Liveried 66720 TnT 66729 haul Wascosa Wagons through West Drayton for London Victoria 28/6/22
The borail, salmon and tench FEA variants from the Victoria event moved from Eastleigh to Bescot on the Eastleigh - Hinksey - Bescot infrastructure trip on Friday (15th July).
There will be 260 FEAs in total. There doesn't appear to be an "Osprey" variant with the fixed "goal posts" for conveying redundant track panels, meaning these will probably be loaded to the flat deck salmons and strapped up in the traditional way.
I expect the venerable coalfish, salmon and osprey fleets to disappear in due course, along with a few other non-standard wagons such as the last FJA super tench and the last few YLAs and YQAs (a few YQAs survive in use with "tench" units fitted). I'm not sure if the new tench / super tench FEAs are intended to displace the entire 2-axle "bass" fleet (mainly OCAs with some OBAs) - it will depend on the state of the existing fleet, how many variants of each module are built and how many "bass" are actually needed in traffic. We'll see...