I’m very comfortable travelling around central London but soon we’ll be staying in Watford and catching the train into London - it seems easy enough but on Google Maps it says it’s West Midlands Trains - how does that work with fares/fare cap - is that part of the TfL thing or should I get a different train? Is it still tap in? The more I look the more I get confused by the options and don’t want to end up paying way over the odds.