The UK’s financial watchdog has ordered Binance to stop all regulated activities in Britain and imposed stringent requirements in a stinging rebuke of one of the world’s biggest cryptocurrency exchanges.

The intervention by the Financial Conduct Authority in recent days is one of the most significant moves any global regulator has made against Binance, a sprawling digital asset firm with subsidiaries around the world. The exchange has until Wednesday evening to confirm it has complied with the watchdog’s demands.

The intervention is a sign of how regulators are cracking down on the cryptocurrency industry over concerns relating to its potential role in illicit activities such as money laundering and fraud, and over often weak consumer protection.