The Folly was really bad when I was there in July (might have been June) - found plastic disposable pint glasses quite offensive, same for the polystyrene food containers but the worst thing was the food... I was quite sick the next day. It sounded like the staff were really fed up with the chef, who was very uncooperative.
On the other hand, I heard from someone who went there a couple of days ago that you can now get your beer in an actual glass, and the food was quite decent, albeit still in polystyrene containers. I suspect they've replaced the chef.
I personally won't be going back until we're allowed back inside the pub itself, and can have food on actual plates, but it does sound like it might have improved recently.