I've had a thought on this matter. I try not to do too much of that 'cos thinking hurts.
I may have been a bit hasty in the 'delayed' statement, it depends what is meant by 'winter'. I automatically defaulted to it meaning the winter timetable change, which is 10 December 2023. It could of course mean the season winter 2023/24 ie December Solstice to March equinox, or the Meteorological Office version. So if they can bring in the new stations by 21ish March 2024 then they would open in winter 2023.
The following is a quote taken from
https://beta.wmre.org.uk/camp-hill-line-stations/ which states Winter.
But that website now says: