Pilot A has about 60 hours total, and completed his PPL four years ago and has not flown for four months, with only five hours in the last year. Basically he is, like many, a pilot who has to think about how to fly and everything is mechanical rather than natural.
He asks Pilot B, his PPL pal, along to act as a safety pilot while he does his required landings. This appears a wise decision even if not strictly legal. His PPL pal has maybe a hundred hours total and 10 hours in the last year but no instructor training or formal safety pilot training
A more likely Group scenario is pilot B has flown 10 hours in the last 6 weeks. There is only one local instructor with experience on the type, and that was more than 10 years ago. And B sits quietly, just responding to "Was that for us?" and " What did ATC say?" Or, (only once, in many years) after 5 go-arounds, "You take it."