I've got a meeting late morning tomorrow near Farringdon station and I'm looking at the easiest way to get there and back. I was thinking of getting one of the Thameslink trains that stops at Farringdon (after changing at Three Bridges). My questions are, will a Horsham to London travelcard allow me to go beyond London Bridge to Farringdon, and if I leave Horsham at 9:20 and return around 13:30, can I get an off peak travelcard?