the line runs from Maidenhead to Marlow via Furze Platt Cookham Bourne end Marlow the route is single line as far as Bourne end and the line is 7 miles long the trains on the route are class 165 and class 166 turbo Diesel mutiple units
For those who would prefer a much larger network including the Marlow branch look here. Warning to those who like modern stuff, it is set in the steam era. https://steamsoundssupreme.com/page_fwrp01.html