His "speaking out" achieved nothing getting him on TV.

He's no whistleblower with inside information. His engineering role is to design track geometry and nothing to do with stations or passengers so he has no professional authority to speak on the subject beyond that of an ordinary rail passenger.

The problems at Euston are well known and obvious to anyone who uses the station.

In fact, the UK rail safety regulator issued an improvement notice with legal force requiring the operator to take steps to change the situation: https://www.orr.gov.uk/search-news/rail-regulator-requires-c...