Was definitely TTC's, as identified by the 'pointy' ends. Both the mast and the 'bridge' were on site, waiting to be bolted together.
I've just been near the compound myself; it's visible from the giant green bridleway bridge east of Braybrooke village (SPC3-35AA). Around 40-45 masts are now there; the majority of masts awaiting installation are indeed TTCs, but there are some other UKMS ones there too - a couple of portal bridges, UC masts etc. (The compound is numbered 'Braybrooke Compound 3' by SPL, so that implies another 2 in the same area.)
Around the bridge itself, 30-40 piles await installation, and another 7 are sunk. Of these 7 piles, all south of the bridge, 5 of these are on the Down side, while the other 2 are on the Up side, protected with a road barrier. (Another pile location, north of the bridge and on the Up side, has a similar barrier in place, but no pile yet).
At SPC3/34 (Three Arch Bridge), the bridge by Braybrooke ATFS, work has now very much progressed - a section of the slope by the access track next to the Up line has been flattened to make way for the ASG building that controls the supply to the OLE once complete. The adjacent National Grid substation work is going nicely too - ABB have delivered a large, substation-y package to National Grid/Murphys etc.
Nothing new yet in the Desborough or Kettering North Jn areas, but Rushton (bridge SPC3-42) has changed beyond recognition! The field to the south of the line and west of the bridge (by the signal gantry), on the Down side, has been cleared and is in the process of being turned into another SPL Compound.
A RRAP has also gone in, meaning that this is likely to be another one with rail access, and will probably cover as far as Kettering North Jn (to the south) and Desborough (to the west), with Braybrooke covering Desboro' to Market H'boro'.
Pics for Braybrooke Compound 3 to follow in a separate post.
Braybrooke ATFS:
1. Bridge ID for the small bridge leading to the construction site.
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2. View looking west towards Mkt H'boro'. Nothing of note yet.
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3. Peg on the Up side for a potential piled foundation.
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4. 222021 passing with a STP-SHF service, showing the compound on the left. Note the road collision barriers beyond the compound, near the milepost - these continue at regular intervals towards the bridleway bridge further east.
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5. Earthworks complete-ish at the spot where the ASG building will eventually go.
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6. ABB (or should I say, A Bloody Big) transformery-type thing. Most likely for the National Grid works.
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Rushton:
1. Looking SW over the old field, now the new compound for works.
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2. Looking west, showing a little more detail.
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3. SW again, showing the extent of temporary land take for the compound.
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4. West again, showing the RRAP in more detail.
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Braybrooke Compound 3:
1. Looking west from the bridleway bridge (SPC3/35AA). Note the vehicle collision barrier on the right.
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2. Looking east from the bridleway bridge. Most piles are on the Down side; note, however, the one on the Up side behind another length of road barrier. Perhaps a portal?
3. Looking NE from ground level, showing the large number of piles on site and the TTC booms awaiting installation.
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4. Another NE view, showing the metalwork in more detail. There are around 35 TTC masts here in total, plus 20 or so booms. Other mast types are also here, but the 380x100 PF DC masts for TTCs are the main type on show.
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5. Another eastern look, showing the RRAP off too.
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Apologies if images don't show up fully in the body of the message - these are all ex-RAW from a DSLR!