Reading through the Internal Market Bill's Delegated Powers Memorandum, it's striking that it makes no effort to acknowledge specifically when powers allow Ministers to amend primary legislation.

Most of the delegated powers are in fact Henry VIII powers. (1/3)

Not just that, but the Henry VIII powers strike at the substance of their own sections. A list of "requirements" or "legitimate aims" might be set out, but Ministers can then pass regulations (with a straight up-or-down vote) totally changing the substance of those lists. (2/3)

When you combine this with the "protection against modification" in clause 49 of the Bill, this effectively removes devolved legislatures and Parliament from detailed discussions about the substance of what the Bill is trying to "protect" about the UK's internal market. (3/3)