Plastic Pollution

[PAPP]

Hello,
I am looking for coves / isolated beaches in UK (preferably west / south west / south / southeast) where there is a lot of accumulated beach plastic.
Ideally I am after 2 or 3 builders bags (2 or 3 cubic meters) of plastic to make trip worth while.
If you know of such places please can you reply with dropped pin link, or lat / long.
Most accessible beaches are not to bad, we typically go to scotland to find the really bad ones.
Investigating access from sea to same end closer to home. Which is Devon, although members in south east also.
Thank you,
Will
People Against Plastic Pollution