The Heathrow Express Dec 19 schedules are now present in the open data stream.
Maintains the 7 day, 4 tph frequency.
Same departures from Paddington as current at xx10 / 25 / 40 / 55
As said earlier, only platform 7 in use.
Departures from Heathrow Central (pad arr in brackets) SX (although arrivals at pad vary a little on saturday and sunday)
xx02 (xx17) / 17 (xx32) / 32 (xx47) / 47 (xx02) all departures on the half minute.
Sat and Sun arrivals: either - xx03/04 / xx18/19 / xx33/34 / xx48/50.
I do see some odd pathing and engineering allowance placements here and there - it's by no means consistent throughout each slot in the hour, but each hour slot does tend to give the same placement. It will all fit together when the rest of jigsaw is published (hopefully) soon.
I thought I would shove it all here, as it's closely related to GWRs timetable.
Wonder how passengers will take to the absence of the layover unit at Paddington? Must provide some psychological reassurance if you're on your way to catch a flight.