The tour that had just opened when the pandemic hit (and which has now been mothballed) was billed as a "reinvented staging of the original production".
"Reinvented" in this context means cheaper, with trims made to the cast size, to the orchestra, and to the set - although I gather from the couple of friends who saw it while it was playing in Leicester that it was much, much better than the Laurence Connor tour from a few years ago. Still, though, smaller than the original London staging in every respect other than the ticket prices.
Saying the "original version" will return to the West End leaves scope to bring the tour production in - although I've no inside knowledge either way, I think it's telling that he chooses the word 'version' rather than the word 'production'. As a businessman, Lloyd Webber knows the difference.