It is because roof-mounted arms connecting trains to overhead electric wires are being checked.
The station was renamed to give England a boost before the match with Mexico - in which Jude Bellingham shone.
An investigation is taking place after a fatal collision between two services heading toward London.
Greater Thameslink Railway is cleaning the exterior of 115 trains, which add up to 46km in length.
Two members of a prisoner escort team were "severely assaulted" in the incident, Serco says.
Thameslink, Southern, Great Northern and Gatwick Express services will be nationalised on Sunday.
The incident has been referred by Hertfordshire Police to the Independent Office for Police Conduct.
A Southern Class 387 train in Brighton is given a rebrand before joining public ownership on 31 May.
Southeastern, Thameslink and South Western Railway timetables change.
