The various gondolas in these photos from behind the scenes at Towers some years ago certainly look like they are from Zodiac at Thorpe Park based on the colours/theming. I guess they were used for parts for Enterprise.
https://www.towerstimes.co.uk/history/behind-the-scenes/storage-areas/
They are definitely Zodiac "Enterprise" cars in the back-storage area. They were doubtless cannibalised for parts. Now Towers just need to find a park / attraction selling Von Roll monorail trains!