If i remember correctly from a age related one I had just before covid hit, it’s height, weight, eyesight (inc colour vision check), hearing (the dreaded booth of despair ), pee in a cup to check for nasties and a nurse will have a chat about any issues medically that you may have. Might have checked blood pressure - can’t recall.
possible to fail? Yep, but nothing that shouldn’t come as a surprise (You generally know if you’re colour blind or not) The hearing test gets people sweating a bit as it’s a bit of a novelty if you haven’t done it before but again, shouldn’t worry you too much (so long as they’ve sorted the secondary glazing out in their new gaff - bloody motorbike went whizzing by on mine. Sound proof my arse!).
Don‘t stress and if your on meds, Take them with you.
bugger, that’s as a driver. Sorry, CSA might be a little different. How do you delete posts here?