If you were last year's appraiser it isn't difficult to view last year's documents in the revalidation management system (RMS). Just go to "Acting as Appraiser" then click on "View".
At the top of the page select last year's tab and you should be able to download any documents which are there.
However, if you were NOT their appraiser for last year, that route is blocked, for some mysterious reason.
But it is possible by following the instructions in this PowerPoint presentation:
How to view last year's documents in RMS (Simon Barton, 2019).
One caveat though: if the doctor had his or her revalidation after last year's appraisal this method probably won't work.