Question: The Warrington station group is a small station group of two railway stations in Warrington, England, consisting of Central, and which other, that serves the town centre of Warrington?

Context articles: Wigan station group
Gainsborough station group
Birmingham station group
Manchester station group
Liverpool station group
Warrington Bank Quay railway station
Warrington station group
Worcester station group
London station group
Dorchester station group

The Wigan station group is a small station group of two railway stations in Wigan, England consisting of North Western and Wallgate.
 The station group is printed on national rail tickets as WIGAN STATIONS.
The Gainsborough station group is a small station group of two railway stations in Gainsborough, England consisting of Central and Lea Road.
 The station group is printed on national rail tickets as GAINSBOROUGH STNS.
The Birmingham station group is a station group of three railway stations in Birmingham city centre, England consisting of New Street, Snow Hill and Moor Street.
 The station group is printed on national railway tickets as BIRMINGHAM STNS and does not include the international station of Birmingham International, which is located some 10 miles east of the city centre next to Birmingham Airport.
The Manchester station group is a station group (for fares purposes) of four railway stations in Manchester city centre, England consisting of Manchester Piccadilly, Manchester Oxford Road, Manchester Victoria and Deansgate.
 The station group is printed on national railway tickets as MANCHESTER STNS.
 For commuters in Greater Manchester the four stations are printed as MANCHESTER CTLZ which additionally includes use of Metrolink tram services in the City Zone (between Deansgate-Castlefield, New Islington and Victoria).
The Liverpool station group is a station group of four railway stations in Liverpool City Centre, England consisting of Lime Street, Central, James Street and Moorfields.
 The station group is printed on national rail tickets as Liverpool Stns and does not include the station of Liverpool South Parkway, which is located south of the city centre in Garston near Liverpool's Airport.
Warrington Bank Quay railway station is one of two railway stations serving the town centre of Warrington in Cheshire, England.
 Warrington Bank Quay is a north-south oriented mainline station on one side of the main shopping area, with the west-east oriented Warrington Central on the other side to the north west operating a more frequent service to the neighbouring cities of Liverpool and Manchester.
 A bus shuttle service operated every 20 minutes from Monday to Friday daytime between the two stations and the Centre Park business park.
 The station is directly on the West Coast Main Line.
The Warrington station group is a small station group of two railway stations in Warrington, England consisting of Bank Quay and Central.
 The station group is printed on national rail tickets as Warrington Stns.
The Worcester station group is a station group of two railway stations in Worcester City Centre, England consisting of Foregate Street and Shrub Hill.
 The station group is printed on national rail tickets as WORCESTER STNS.
The London station group is a ring of 18 railway stations served by the National Rail network in central London.
 Most are terminal stations, although a few are through-stations (that includes those with a combination of terminal and through platforms).
 Each of these stations is part of a notional "common location" to which tickets from stations outside that group are issued.
 The station group is rendered on tickets as "London Terminals".
The Dorchester station group is a small station group of two railway stations in Dorchester, England consisting of South and West.
 The station group is printed on national rail tickets as DORCHESTER STNS.