If you were to build a depot for Channel Tunnel passenger trains, where would you build it?

When it was announced that Virgin Trains was successful in being allocated maintenance depot capacity at Temple Mills in east London, there was a sort of reaction “we’ll that will mean that Virgin will be the competitor to Eurostar then.” But no sooner had the decision been made that I started to have this nagging feeling that this was not the last of this maintenance issue, and that not being allocated maintenance capacity at Temple Mills could even be a blessing in disguise.

Two pieces of information that have come to light since the Temple Mills decision further confirm this. First, Trenitalia is reported to be looking for a maintenance facility close to Paris, and is not abandoning plans for London. And second a source close to one of the other unsuccessful bidders for Temple Mills told me they are not giving up as they are sure there are bumps ahead before Virgin has everything they need in Temple Mills.

In the French national market both Proxima/Velvet and Kevin Speed/illisto are advancing with plans to not rely on existing workshops for their maintenance, and in the UK DfT has started to think openly about alternatives to Temple Mills.

So then – in typical #CrossBorderRail / #CrossChannelRail style – can we start to work out, publicly, where such maintenance facilities would be constructed?

What does any operator need to find? Ideally a brownfield site, something that is or was railway land, and has easy track access to the core high speed Channel Tunnel routes, so somewhere along HS1 to the Channel Tunnel, along LGV Nord in France, or potentially along LGV 1 in Belgium. Space to build a maintenance shed at least 400m in length would be ideal, although 200m would be enough at a push. And this site would ideally be as close as possible to one of the main terminus stations for Channel Tunnel routes – London St Pancras, Paris Nord or, possibly, Bruxelles Midi. For Trenitalia (and hence not for Gemini, Evolyn or Virgin, in the case of Temple Mills issues) a location that is also accessible from Paris Gare de Lyon from which their services depart to the rest of France would make additional sense. And more widely were it not possible to respect all of those criteria I suppose some sites in the middle of the routes – in particular in or near Lille – might need some additional consideration, although that might then necessitate services starting or terminating in Lille that no one has done to date.

So what have I found so far?

Everything is gathered together on this so far rather provisional map – zoomable version.

Explanations of each area, UK first:

Nothing is as good as Temple Mills, but there are a few options. Something at or close to the Barking container terminal (20km from St Pancras) might work, although track access off HS1 and the total space available are complicated. There are sidings in an old quarry at Northfleet, just beyond Ebbsfleet station on HS1. A depot here would likely accommodate max 200m trains, but it is brownfield land and is just 37km from St Pancras. At Ashford there is the maintenance facility for Hitachi’s class 395 trains, but access to the depot is third rail electrified only at the moment, and the site is very constrained. Ex railway land south east of Ashford station also merits a further look, although Ashford is 91km from London. Dollands Moor the under-used freight terminal at the UK end of the Channel Tunnel would likely have enough space, but as it is 107km from London its location is not ideal. While the Eurotunnel terminal in the UK is rather constrained, the Calais terminal has plenty of space and maintenance facilities for locomotives – but that is 166km from London.

Theoretically empty stock could be moved from Calais to Lille and services start there. But that is still 105km. Déliverance in Lille, a freight yard to the west of the city, has plenty of space and is 16km from Lille Europe station on existing infrastructure. Ronchin – a site used by SNCF track maintenance trains currently – is only 3km from Lille Europe, but a small connecting curve is missing, preventing easy access from there to Lille Europe.

And then to greater Paris. This is really complicated. The most obvious site to develop would be Drancy (12km from Paris Nord), but the track layout between La Plaine and Paris Nord is far from ideal, and getting paths could be complicated. Vaires-Torcy has plenty of space, but getting to Paris Nord from there is even more complicated – it is either a horrible 112km around the outer edge of Paris, or 34km but needing reversing at Pierrefitte. Drancy could be an alternative for the reversing manoeuvre. Villeneuve-Saint-Georges likewise has plenty of space, but is 104km from Paris Nord. These three sites could be of particular interest to Trenitalia as Paris Gare de Lyon can also be reached from these (41km from Drancy, 37km from Vaires-Torcy and 13km from Villeneuve-Saint-Georges).

Were a site needed only for Channel Tunnel services then there are a few more options. Persan-Beaumont (47km) and Creil (50km) would have adequate space, although routes to Paris Nord from either are on comparatively full tracks. Longueil-Sainte-Marie (67km) is furthest, but is on LGV Nord, but a tiny connecting curve onto the high speed line is missing, making this one complicated.

So what am I missing? What have I overlooked? What other sites should be considered? I will updated this post and the map accordingly.

And as I am travelling to the UK for an event in Ashford on 8th January 2026 that will be an opportunity to have a closer look at some of the UK sites.

Images used in this post

Train Photos
Dollands Moor
July 18, 2021
CC BY-SA 2.0

(Cross-posted from the #CrossChannelRail site)

Source: https://jonworth.eu/if-you-were-to-build-a-depot-for-channel-tunnel-passenger-trains-where-would-you-build-it/