Thanks for the examples, Funt. Looks like both prog and annual reprint would be good sources, either for full page replacements or panel-by-panel (although there's a good bit of loss of detail around things like Dredd's badge in the CF reprint, you could improve the look of the page a lot with a panel replacement for the robots).
As David says, annual, yearbook etc. reprints were often edited by art staff to fit the new page dimensions, and it's a pity as they are often the best source for scans for reprint - better quality stock, more robust and longer-lasting vs the more ephemeral weekly comics etc. We reprinted "Dash Decent" in full in our Kevin O'Neill collection and when it came to finding source scans there was a fantastic reprint of it in one of the '90s yearbooks (really crisp, and it looked like it was taken from either original art or good film copies) but because of the change in format it had been edited - and in this case, not particularly well - to extend the page vertically. We ended up using it, but I rebuilt the strip page-by-page to "un-edit" it back to match the original in the prog, and used scanned elements from the prog pages where the editing for the yearbook had removed captions, shifted elements, removed letratone... It was a huge task, but I think it gave us the best version of the strip available. We did the same for the opening half-dozen pages of "Captain Condor", using a later reprint and "un-editing" it to match the original printing, so I clearly never learned my lesson

It would certainly be possible to "un-edit" the annual version of "Father Earth" (again, looks like it's been edited to extend vertically based on the addition of the black areas above the panels) but it would likely be a fair investment in time for Rebellion's repro droids. The original prog looks decent though, and would probably be a quicker and easier fix for the poor pages, so hopefully it will be taken on for future reprints.