Complex sentence: On the National Rail network, the station is served by Chiltern Railways trains between Marylebone and Aylesbury whose next stopping points in each direction are Chorleywood and Harrow-on-the-Hill stations.
Split into simpler sentences: On the National Rail network, the station is served by Chiltern Railways trains from Marylebone towards Aylesbury. The station is situated between Chorleywood and Harrow-on-the-Hill stations.