Earlier quoted context omitted.
Because Great Britain is not part of the Schengen customs zone, customs checks are required before boarding the train (this is the only train at the station with such checks). Due to the renovation, the part of the station where passport and baggage checks by customs officers were performed is to close down && turns out there's not enough space at the station to house temporary border checks, so... no train.
Why do custom checks happen in NL on the ground, and not on-train? The train still goes through Belgium(at least), where no customs checks would be required
Ths UK has this minister who seems to really really really really really not want people sneaking into the UK, not even if it's a handful per year.
The two paragraphs could be causally connected. I don't know.