I am preparing for my first trip to Europe later this week.
From what I have read online, I know what to expect as far as using the Underground with an Oyster card (scan it when going into the tube station and when leaving the destination station).
However, I am not sure how the Overground ticketing works - is it similar? I will be purchasing tickets to Windsor & Eton Riverside at Waterloo Station, combined with the discounted Windsor Castle ticket from South West Trains.
Since I am buying a special package deal, I am assuming that I will have to go to a staffed ticket window -- are there specific ticket windows for South West?
Once I have the train ticket, will I need to scan it or validate it with a timestamp anywhere before getting on my train?