Someone on Twitter complained to GWR▸ (Great Western Railway) that this morning's 0815 departure from Pewsey departed at 0812 which meant that some passengers missed it through no fault of their own and had to wait over an hour for the next train at 0927
https://x.com/thompson_r86939/status/1879082643758940168
I checked the train in question - 1J72 - on RTT» (Real Time Trains - website) and it shows that it indeed departed Pewsey 3 minutes earlier than scheduled:
https://www.realtimetrains.co.uk/service/gb-nr:Y22156/2025-01-14/detailed#allox_id=0
I don't think this sort of thing happens very often, does it?