Dear Sir
Thanks for your info which is I am sure very useful.
Can you please assist on one point.
Recently got a Freedom Pass. I thought starting time at Sydenham and Forest Hill was 0930.
Staff at both stations say 0900 and the oyster machines accept the cards.
This would have been the end of the discussion except others tell me that overground are still 0930 but the Oyster Machines only register your exit , say at Croydon ot London.
Is it you must not arrive before 0930 , or is it free at any time after 0900 , whatever time you arrive st Dest.
Thanks