 Following the opening of the line , 17 trains per weekday ran in each direction at intervals of one hour from around 7 am to around 11 pm . The initial trains were drawn by Metropolitan Railway A and B Class locomotives . Most trains stopped at all stations , but a fast trains each morning ran between Chesham and Baker Street , taking 50 minutes from start to finish . On Sundays , trains again ran at hourly intervals , but only 12 trains per day ran and there was a three @-@ hour gap in services in the morning to allow the railway 's staff to attend church . 
