Macro To Move Range Of Cells When Value Of One Cell Changes?

I have an excel file that contains data from bank transactions.

In column A at irregular intervals is a cell with " User Group:" It depends on how many transactions there are in a batch, could be 1 or up to say 200 as to when the next "User Group" cell is found.

After that also in column A is "Item" then "Lodgement Ref" then at the end "Batch Totals"

i.e.
User Group:
Item
Lodgement Ref
Batch Totals:
User Group:
Item
Lodgement Ref
Lodgement Ref
Lodgement Ref
Batch Totals:

I want to find each instance of "Item" then move that cell and every cell over to column CK down to and including "Batch Totals" i.e. A3401 to CK3410 to CM 3400 so it lines up with the top of the transaction block.

There are over 60,000 lines so it's worth trying to find a solution as I can then use the methodology to make other refinements in the spreadsheet.