Question: Which English Coast Line is served by both Corkickle railway station and Whitehaven railway station?

Context paragraphs:
Spey Bay railway station: Spey Bay railway station was a railway station in Spey Bay, Moray.  The railway station was opened by the Great North of Scotland Railway (GNoSR) on its Moray Firth coast line in 1886, served by Aberdeen to Elgin trains.  The station was originally named Fochabers-on-Spey railway station on 1 May 1886.  In November 1893 it became Fochabers railway station, Fochabers and Spey Bay railway station on 1 January 1916 before finally becoming on 1 January 1918 Spey Bay railway station.  It closed to regular passenger traffic on 6 May 1968 on the same date as the line itself.

Stockton railway station (County Durham): Stockton railway station serves the town of Stockton-on-Tees, within the borough of Stockton-on-Tees and the ceremonial county of County Durham, England.  The railway station is located on the Durham Coast Line and is operated by Northern who provide all of the station's passenger services.  Thornaby railway station, across the River Tees from Stockton-on-Tees provides a wider range of services and acts as the main railway station for most of Stockton-on-Tees.  The station originally had a roof but it was removed in 1979 due to being in a bad state of repair and it has not been replaced since (the same work also saw the removal of redundant track & platforms).  The other main buildings are also no longer in rail use, having been converted into apartments.

Corkickle, Cumbria: Corkickle is a hamlet in Cumbria, England.  It is served by Corkickle railway station.

Portgordon railway station: Portgordon railway station was a railway station in Portgordon in Moray.  The railway station was opened by the Great North of Scotland Railway (GNoSR) on its Moray Firth coast line in 1886, served by Aberdeen to Elgin trains.  The station was originally named Port Gordon railway station until 1938 when it was renamed 'Portgordon' by the London and North Eastern Railway, closing to regular passenger traffic on 6 May 1968 on the same date as the line itself.  A photograph of 1968 shows a name board with 'Port Gordon' clearly displayed.

Nanjing South Railway Station: The Nanjing South Railway Station () (IATA: NKJ) is a high-speed railway station in Nanjing, Jiangsu, People's Republic of China, serving the Jinghu High-Speed Railway, Huning Intercity Rail, Ninghang Passenger Railway and the Huhanrong (Shanghai–Wuhan–Chengdu) Railways.  The New Nanjing South Railway Station station is located a few kilometres south of downtown Nanjing.  The station's construction site is already connected with central Nanjing by Line 1, Line 3 and Line S1 of Nanjing Metro.  On September 30, 2016 the metro station served a peak volume of 102,300 passengers.  According to CCTV, it is the world's second largest railway station in terms of GFA (Gross Floor Area) at 458,000 square metre (4,929,871 square ft).  The dimension of the main roof is 456m x 216m (excluding smaller roof on both sides of the main roof), the main roof is constructed with steel weighing more than 8000 tons.  The roof on top of the waiting hall area (part of the main roof) is 72,000 square meter (775,001 square ft).  The entire railway station has 128 escalators, and 28 platforms (a combination of island-platforms and side-platforms).  At the peak of the construction phase, there were more than 20,000 construction workers and engineers at work.  Solar panels cover the majority of the railway station roof and are capable of providing 7.17 MW (megawatt) of electricity.

KTM East Coast Railway Line: The East Coast Railway Line is the single track metre gauge runs between Gemas railway station, in Negeri Sembilan and Tumpat railway station, in Kelantan of Malaysia.  Gemas is the rail junction between the West Coast line and East Coast railway line.  Like the West Coast Railway Line, it is called the East Coast Railway Line (Malaysia) because it serves two of Peninsular Malaysia's East Coast states, namely Pahang and Kelantan.  In fact, it does not run along the coast at all and only meets the South China Sea when it terminates in Tumpat railway station.  It runs through the interior, often through deep jungle, thus earning the nickname Jungle Railway.  Terengganu is the only state in Peninsular Malaysia not served by the KTM railway network.

Buckpool railway station: Buckpool railway station was a railway station in Buckpool near Buckie in Moray.  The railway station was opened by the Great North of Scotland Railway (GNoSR) on its Moray Firth coast line in 1886, served by Aberdeen to Elgin trains.  The village and station were originally named Nether Buckie station and the station was renamed 'Buckpool' on 1 January 1887, closing to regular passenger traffic on 7 March 1960, several years before the closure of the line itself in 1968.

Whitehaven railway station: Whitehaven railway station serves the town of Whitehaven in Cumbria, England.  The railway station is a stop on the scenic Cumbrian Coast Line 63 km south west of Carlisle.

Ravenglass (R&amp;ER) railway station: Ravenglass Heritage Railway Station is the Western terminus of the Ravenglass and Eskdale Railway.  It is situated to the east of main line railway station, which is itself a station on the Cumbrian Coast Line.  The facilities at the railway station include toilets, under-cover platforms, booking office and café.  The railway station complex incorporates 2 locomotive sheds, a carriage shed, a signal box, managerial offices and 2 camping coaches; along with the railway station itself.

Corkickle railway station: Corkickle railway station serves the Whitehaven suburb of Corkickle in Cumbria, England.  The railway station is a request stop on the scenic Cumbrian Coast Line 68 km south west of Carlisle.  The station opened in 1855 and is at the southern end of the 1219 m tunnel from Whitehaven railway station.  At times it was known as 'Whitehaven Corkickle' station.

Supporting paragraphs: Corkickle railway station Whitehaven railway station
Answer: Cumbrian Coast Line