Rolling stock › On order and plannedData updated
Eurostar Celestia
Alstom's double-deck Avelia Horizon, ordered to grow Eurostar's fleet to 67 trains with the 17 e320s and open new routes to Frankfurt and Geneva.
Scale
Eurostar Celestia · indicative drawing GB Trains · gbtrains.uk/stock/celestia/ · CC BY 4.0
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- Type
- Double-deck high-speed train
- Builder
- Alstom (Avelia Horizon)
- In service
- first trains January 2031; in service from May 2031
- Operators
- Eurostar
- Formation
- 11 vehicles: 2 power cars and 9 double-deck cars, 656 ft (200 m); two can run together as a 1,312 ft (400 m) train
- Trains in fleet
- 30 ordered, with an option for 20 more
- Power
- overhead electric: the four-voltage Avelia Horizon (Alstom doesn't list the four) · how it works
- Profile
- main-line
- Seats per train
- 540
- Total capacity
- about 540 seats per 656 ft (200 m) train, about 1,080 for two coupled
- Status
- On order. Temple Mills depot is to be upgraded for them.
Sources
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Show the 22 sources from Wikimedia Commons, Eurostar, Alstom and 4 more
- Introducing Eurostar Celestia Eurostar, 22 October 2025order, option, dates, length, seats, fleet of 67, depot upgrade
- Direct services to Frankfurt and Geneva with new fleet Eurostar, 10 June 2025Frankfurt and Geneva
- 2025 full-year results Eurostar, 2 June 2026first payment to Alstom
- Eurostar chooses Alstom for 30 Avelia Horizon very high-speed trains Alstom, 22 October 2025two power cars and nine articulated double-deck cars; the four-voltage Avelia Horizon
- TGV M (Avelia Horizon) Wikipedia (French)the indicative drawing: power cars of 59 ft (18 m), trailers 3 ft 3 in (1 m) shorter than the earlier TGVs', the greffon, height 14 ft 2 in (4.318 m; TGV M figures, a weaker source)
- The Avelia Horizon trains Eurostar has ordered from Alstom are not compliant with Channel Tunnel evacuation rules (with 'Channel Tunnel New Rolling Stock: Controlled Stop Evacuation Schemas', a to-scale PDF) Jon Worth, #CrossChannelRail, 22 November 2025the indicative drawing: the first passenger door at the rear of the first car, 112 ft (34 m) from the nose; vehicle lengths measured off its to-scale diagram
- TGV M 998 en gare de Poitiers (photograph, CC0) Wikimedia Commons (AFooz), 26 November 2023the indicative drawing: the double-deck cars' layout and heights, the bogies (layout only)
- 2025-08-01, TGV M 1007 near La Rochelle (photograph, CC BY 4.0) Wikimedia Commons (Patrycja Rosa), 1 August 2025the indicative drawing: the power car's nose, windows, cab door and roof (layout only)
- TGV M Plouaret (photograph, CC BY-SA 4.0) Wikimedia Commons (Spendeau), 5 July 2023the indicative drawing: the doors' order along the train (layout only)
- TGV-M 1402 in Tournai: carriages, door and power car profile (photographs, CC BY-SA 4.0) Wikimedia Commons (Jon Worth), 3 March 2026the indicative drawing: the double-deck cars' end panels, the shrouded underframe (layout only)
- Eurostar Group reveals new brand Hospitality ON, January 2023the indicative drawing's colours: Eurostar's trains kept their liveries after the 2023 rebrand (Thalys red on the Continent)
- The Greatest Gathering - 1st August 2025 - 36 (photograph, CC BY 4.0) Wikimedia Commons (kitmasterbloke, via Flickr), 1 August 2025, Alstom Derby Worksthe indicative drawing's power-car bogies, drawn as the 373's (layout only; the TGV M's own not seen)
- TGV - Bogie (photograph, CC BY-SA 4.0) Wikimedia Commons (PA), 22 October 2017, Bordeaux-Saint-Jeanthe indicative drawing's Jacobs bogies, drawn as the earlier TGVs' (layout only)
- TGV Euroduplex Jacobs Bogie (photograph, CC0) Wikimedia Commons (RAIL P), 2 January 2025, Rennesthe indicative drawing's Jacobs bogies, drawn as the earlier TGVs' (layout only)
- Eurostar e300 photographs: 3212 at Albertville (Florian Pépellin, CC BY-SA 4.0, 2018), 3999 at the Greatest Gathering (kitmasterbloke, CC BY 4.0, 2025), 3230 at Ashford (N Chadwick, CC BY-SA 2.0, 2019), St Pancras (DaveLevy, CC BY-SA 2.0, 2024), 373 008 at Lenham (kitmasterbloke, CC BY 4.0, 2026) and others Wikimedia Commons, 2015-2026the indicative drawing's colours: Eurostar's e300 and e320 livery (shared with the 373 and 374)
- Eurostar chooses Alstom for 30 Avelia Horizon very high-speed trains Alstom, 22 October 2025power: the four-voltage version of the Avelia Horizon
- 2025-08-01, TGV M 1007 near La Rochelle (photograph, CC BY 4.0) Wikimedia Commons (Patrycja Rosa), 1 August 2025the drawing's pantographs: the lowered roof at the power car's rear and a dark shape at its front end (a TGV M; photograph, layout only)
- Rame TGV M 1008 Ligne Ferroviaire Paris Lyon Marseille Saint Charles - Paris XII (FR75) - 2026-01-11 - 3.jpg: a TGV M from above (photograph, CC BY-SA 4.0) Wikimedia Commons (Chabe01), 11 January 2026the drawing's pantographs: one folded in the power car's rear well (a TGV M from above; photograph, layout only)
- Rail Replacement System (UK5 transparency notice, 2026/S 000-002777) Network Rail (High Speed) Limited, via Find a Tender, 13 January 2026, p. 2the "In operation" drawing's contact wire: 16 ft 8 in (5.08 m), HS1's normal height
- TGV-M 1402 in Tournai - carriages (55145302764).jpg (photograph, CC BY-SA 4.0) Wikimedia Commons (Jon Worth from Germany), 3 March 2026the cab ends' couplers: hidden behind the closed nose or cover, none drawn at a free cab end (set BC10, 20 October 2026; layout only)
- TGV-M 1402 in Tournai - carriages (55145302764).jpg (photograph, CC BY-SA 4.0) Wikimedia Commons (Jon Worth from Germany), 3 March 2026the dark connections between the double-deck cars, running up to the roof between their rounded corners (set JN3732; at an angle, layout only)
- Rame TGV M 1008 Ligne Ferroviaire Paris Lyon Marseille Saint Charles - Paris XII (FR75) - 2026-01-11 - 3.jpg: a TGV M from above (photograph, CC BY-SA 4.0) Wikimedia Commons (Chabe01), 11 January 2026the connection at the power car: the dark seal following the double-deck car's corner, the power car's rear roof cowl beside it (set JN3732; from above, layout only)
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- The louvred grille by each double-deck car's door end: a framed hatch with rounded corners about 2 ft 11 in to 6 ft 7 in (0.9-2.0 m) up holding horizontal louvres about 3 ft 11 in to 5 ft 7 in (1.2-1.7 m) up, from photographs of SNCF's TGV M (1402 at Tournai, 1007 near La Rochelle; layout only, heights estimated through perspective)
- The drawing: indicative. No dimensioned drawing of the Celestia or the TGV M has been published. Every vehicle length, bogie position, door and window is estimated, from French Wikipedia (59 ft (18 m) power cars, trailers 3 ft 3 in (1 m) shorter than the 61 ft 4 in (18.7 m) of earlier TGVs, 14 ft 2 in (4.318 m) high), Jon Worth's to-scale diagram (first passenger door 112 ft (34 m) from the nose) and photographs of SNCF's TGV M taken at an angle, good to about half a metre
- The drawing: the power car's length. French Wikipedia gives 59 ft (18 m) and Jon Worth's diagram measures 59 ft 9 in (18.2 m); an IRJ snippet gives 62 ft (19 m). The drawing uses 59 ft (18 m), so that 656 ft (200 m) holds the 58 ft 1 in (17.7 m) cars; at 62 ft (19 m) only about 3 ft 11 in (1.2 m) would be left for each greffon
- The drawing: SNCF's 9-car TGV M is given as up to 663 ft (202 m), the Celestia as 656 ft (200 m). The drawing makes it 656 ft (200 m) exactly
- The drawing: Eurostar's current colours (its e320s and e300s), not the Celestia's, which has not been announced
- The drawing's pantographs: indicative, one folded in each power car's rear well as SNCF's TGV M has it (photographs, layout only); the Celestia's own pantographs haven't been published
- The connections between cars (set JN3732): drawn to the roof between the double-deck cars and to the power car's drawn rear roof (13 ft 1 in (3,980 mm)) at its join, from photographs at an angle (TGV M 1402 at Tournai, 1008 from above at Paris); 1008 shows the dark seal following the double-deck car's corner up to its roof and the power car's rear roof cowl standing about as high, so the power car's drawn rear end may be too low
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