British Rail Class 221
E751752
The British Rail Class 221 is a fleet of high-speed diesel-electric tilting multiple units used on intercity services in the UK, closely related to the Voyager family of trains.
All labels observed (1)
| Label | Occurrences |
|---|---|
| British Rail Class 221 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8667944 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: British Rail Class 221 Context triple: [Voyager trains, familyMember, British Rail Class 221]
-
A.
British Rail Class 222 Meridian
The British Rail Class 222 Meridian is a high-speed diesel-electric multiple unit train used in the UK for intercity services, known for its modern design, improved passenger comfort, and performance on routes such as those operated by East Midlands Railway.
-
B.
British Rail Class 321
The British Rail Class 321 is a type of electric multiple unit train introduced in the late 1980s for commuter and regional services in the UK, widely used in East Anglia and other routes before being superseded by newer fleets.
-
C.
British Rail Class 172
The British Rail Class 172 is a diesel multiple-unit train used on regional and suburban services in the UK, featuring improved performance, reliability, and passenger comfort over earlier Turbostar units.
-
D.
British Rail Class 332
The British Rail Class 332 is an electric multiple unit train type built in the late 1990s specifically for high-speed, premium passenger services between London Paddington and Heathrow Airport.
-
E.
British Rail Class 171
The British Rail Class 171 is a diesel multiple unit train used primarily by Southern in the UK, closely related to the Class 170 but equipped with different coupling systems for compatibility with other Southern stock.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: British Rail Class 221 Target entity description: The British Rail Class 221 is a fleet of high-speed diesel-electric tilting multiple units used on intercity services in the UK, closely related to the Voyager family of trains.
-
A.
British Rail Class 222 Meridian
The British Rail Class 222 Meridian is a high-speed diesel-electric multiple unit train used in the UK for intercity services, known for its modern design, improved passenger comfort, and performance on routes such as those operated by East Midlands Railway.
-
B.
British Rail Class 321
The British Rail Class 321 is a type of electric multiple unit train introduced in the late 1980s for commuter and regional services in the UK, widely used in East Anglia and other routes before being superseded by newer fleets.
-
C.
British Rail Class 172
The British Rail Class 172 is a diesel multiple-unit train used on regional and suburban services in the UK, featuring improved performance, reliability, and passenger comfort over earlier Turbostar units.
-
D.
British Rail Class 332
The British Rail Class 332 is an electric multiple unit train type built in the late 1990s specifically for high-speed, premium passenger services between London Paddington and Heathrow Airport.
-
E.
British Rail Class 171
The British Rail Class 171 is a diesel multiple unit train used primarily by Southern in the UK, closely related to the Class 170 but equipped with different coupling systems for compatibility with other Southern stock.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
British Rail multiple unit class
ⓘ
diesel-electric multiple unit ⓘ tilting train ⓘ |
| brakingSystem | electro-pneumatic brakes ⓘ |
| builtAt |
Bruges, Belgium
NERFINISHED
ⓘ
Wakefield, England NERFINISHED ⓘ |
| countryOfOperation | United Kingdom ⓘ |
| couplingType | Dellner coupler NERFINISHED ⓘ |
| designedFor | tilting operation on curving main lines ⓘ |
| doorType | powered sliding plug doors ⓘ |
| enteredService | 2002 ⓘ |
| family | Voyager NERFINISHED ⓘ |
| formation |
4-car sets
ⓘ
5-car sets ⓘ |
| formerOperator |
Virgin CrossCountry
NERFINISHED
ⓘ
Virgin Trains NERFINISHED ⓘ |
| gauge | standard gauge ⓘ |
| hasFeature |
air-conditioned coaches
ⓘ
first-class accommodation ⓘ on-board catering facilities ⓘ standard-class accommodation ⓘ tilt can be disabled on some routes ⓘ |
| introduced | early 2000s ⓘ |
| manufacturer | Bombardier Transportation NERFINISHED ⓘ |
| multipleWorking |
with Class 220 Voyager
ⓘ
with other Class 221 units ⓘ |
| operator |
Arriva CrossCountry (as CrossCountry)
NERFINISHED
ⓘ
Avanti West Coast NERFINISHED ⓘ CrossCountry NERFINISHED ⓘ |
| owner | rolling stock leasing companies in the UK ⓘ |
| powerType | diesel-electric ⓘ |
| propulsion | underfloor diesel engines driving electric traction motors ⓘ |
| relatedTo |
British Rail Class 220
NERFINISHED
ⓘ
British Rail Class 222 NERFINISHED ⓘ |
| safetySystem |
AWS
NERFINISHED
ⓘ
TPWS NERFINISHED ⓘ |
| serviceType | intercity passenger service ⓘ |
| subclassOf | Voyager family NERFINISHED ⓘ |
| tiltingTechnology | hydraulic tilt system ⓘ |
| topSpeed |
125 mph
ⓘ
200 km/h ⓘ |
| trackGauge | 1435 mm ⓘ |
| usedFor |
high-frequency intercity services
ⓘ
long-distance services ⓘ |
| usedOn |
CrossCountry network
NERFINISHED
ⓘ
West Coast Main Line NERFINISHED ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: British Rail Class 221 Description of subject: The British Rail Class 221 is a fleet of high-speed diesel-electric tilting multiple units used on intercity services in the UK, closely related to the Voyager family of trains.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.