17 says Wikipedia, but the information might be out of date. See [1]. The existing quad-track line carries 15 trains per hour [2], and is full, but this is bec

17 says Wikipedia, but the information might be out of date. See [1]. The existing quad-track line carries 15 trains per hour [2], and is full, but this is because it carries trains of varying speed -- express passenger trains, commuter/regional trains and freight. (The Victoria Line is a metro line, pretty irrelevant comparison.) [1] https://en.wikipedia.org/wiki/High_Speed_2#Proposed_service_pattern https://en.wikipedia.org/wiki/High_Speed_2#Proposed_service_... [2] https://www.railforums.co.uk/threads/how-many-trains-run-per-hour-between-milton-keynes-and-london-euston.140441/#post-2847202 https://www.railforums.co.uk/threads/how-many-trains-run-per...