There are rumours swirling that DBGT may be on its way out... construction walls were up in the shop on the last day of the 2022 season according to
Theme Park Guide, and there were construction materials, as well as old bits of theming, behind these walls:
https://themeparkguide.co.uk/news-page/End-Of-The-Line-For-Derren-Browns-Ghost-Train
Some of the theming in the shop was also draped in tarpaulin.
Could the end of the line be nigh for DBGT, in its current form at least?
I'm not sure, personally. Given it was a £30m investment, I imagine they'd want to get at least a decade or two of shelf life out of it, so I'd be surprised to see them shut it after 6 years.