Also, the cost of actually closing a station is not negligible. From the same article: Closing down a line is cumbersome. There must first be a transport appra

Also, the cost of actually closing a station is not negligible. From the same article: Closing down a line is cumbersome. There must first be a transport appraisal analysing the effect of a closure on passengers, the environment and the economy. The proposal is submitted to the Department of Transport and at that point its details must be published in the press, six months ahead of the closure. Then comes a 12-week consultation period, during which time anyone is welcome to protest; public hearings are sometimes held, especially if the closure is controversial. Then, finally, the plans are submitted to the Office of Rail and Road, who decide if the line closes. As a result it often costs less – in terms of time, paperwork and taxpayers’ money – to keep a line running at a bare minimum.