I’ve noticed some trains with certain destinations aren’t showing in the Arrivals API.
Any trains on the Bakerloo terminating at Waterloo,
Any trains on the Jubilee terminating at West Hampstead,
And from memory any trains on the Piccadilly terminating at Heathrow T4.
I have access to the internal Trackernet and can watch trains on there running as timetabled but they are completely missing from the feeds.
I’d imagine the services to Heathrow T4 for the Piccadilly Line is actually terminating at Hatton Cross as a passenger service which is missing from the API arrivals.
And also District Line services to High Street Kensington is missing too.