Sorry - I should have said London and North Western Railway Company.
I found this reference to the Dublin line.
"In 1861 the London and North Western Railway Company which had been operating a steam packet service across the Irish Sea, moved its Irish terminus from Kingstown (Dun Laoghaoire) to North Wall Quay.
In 1883 the company bought the Prince of Wales Hotel, and soon afterward replaced it with the London and North Western Hotel. It was later known as the British Rail Hotel. With the demise of the ferry services from North Wall, the building was taken over by CIE, and it now contains offices of Irish Rail. It was later known as the British Rail Hotel.
Dublin Street Directory 1862 places the Prince of Wales Hotel between 55a and 55b North Wall Quay."