The UK's Financial Conduct Authority (FCA) has intensified its regulatory actions against unregistered cryptocurrency exchanges, issuing hundreds of warnings in October. Notable exchanges such as Elite Bit Markets, Nexure Gainbit, Plux Crypto, and HTX have been targeted. The FCA has also initiated legal proceedings against HTX for promoting crypto services to UK residents without proper registration. The FCA's actions are part of a broader effort to enforce compliance with the UK's financial promotions rules, which require crypto firms to be registered under money laundering regulations. Despite easing some restrictions, such as lifting the ban on crypto exchange-traded notes, the UK maintains strict advertising regulations to protect consumers. Violations of these rules can result in severe penalties, including imprisonment for executives. However, many flagged crypto advertisements remain online, highlighting ongoing challenges in enforcement.