For most of the 20th century the Liberal Party was an electoral irrelevance. They had split over Home Rule in the 19th-c, and over the National Government in the 1930s. They never formed a government again after Lloyd George and by the 1950s the party had so few MPs left that it came close to extinction, and the party conference could almost be held in a phone booth (remember them?). They kept on telling themselves they were on the edge of a great revival but it never seemed to happen. Their support has been, and remains, strong in some regions of the country, but it was only regional, and often a long way from London.
Indeed. The most remote-from-London constituency is Orkney & Shetland, and that’s had some flavour of Liberal as an MP - barring a short period around WWII - since 1859.