--- Colin Rosenstiel said:

(Theo Markettos) wrote:

What were platforms 20-24 used for before construction of the
Eurostar terminal?

There were only 2 platforms, 20 and 21. There were also some
sidings and the lift used for access to the Waterloo and City Line.


Are you sure? IIRC there were for platforms (18-21) but when they were
demolished, two new Southampton line platforms were opened up in the
centre of the station, to make up for it, and the Windsor lines --
including the platform numbers -- were shifted along to make room. (I'm
not putting this into words very well, but it makes sense if you think
about it.)