Jeremy Candfield, of supplier organisation the Railway Industry Association, has also shoved his head above the parapet.
He writes on Tom's blog:
"Deeply disappointed. The railway needs and respects your common sense, wisdom and obvious commitment. You have left a hard act to follow; we will miss you."
As the scaredy-cat industry wouldn't normally say boo to a goose the growing list of railway names mourning Tom's departure is beginning to sound like a vote of no confidence in Gordo's reshuffle.