Hi @Prufrock. Really sad that you have not had a great experience so far. I bought nine of these in total and have drunk one so far (none from M&S btw).
My bottle was stunning and most of the CellarTracker reviews are pretty solid so I’m wondering if yours got poor storage before you got hold of them. PR is one of my go to’s in both NV and Vintage and I can’t remember a bad bottle.
Fingers crossed for the other bottles.