Peter, I think it's a balancing act whilst the far end is located. They maybe just want that end to be lighter so they can easily jack it up to rest on a newly installed part of the that particular pier.

Yes I think it could be for balancing the whole thing? I’m not sure how its counterweights work so maybe it needs this to help it balance?

A backwards segment shuffle to defer to Domique's wide gait ? Who knew there was a Colne Valley HS2 two step ? We can only witness and gawk at these modern dance moves ! Maybe the segments got out of order so they must all go back towards Birmingham blues bucket to be reprimanded for getting out of line with Dominique nearing the end of this HS2 gala. There must only be only one next segment and maybe they were all rushing together and got confused ?