UK Non-GamStop Online Betting Sites – Listīelow, we give a brief overview of the 9 best UK betting sites not on GamStop. Because of this, we’ve curated a well-researched list of the best bookmakers and casinos not on GamStop UK, where you can continue playing games when registered on the self-help platform. However, many UK casinos block GamStop users even when they don’t have gambling addiction problems. When you activate a GamStop account, you cannot play at UK casinos registered on the platform. Gambling can be addictive, and organisations like GamStop encourage responsible gambling by allowing players to register for a nationwide self-exclusion programme.