British consumers buying cryptoassets will get a 24-hour "cooling-off" period for the first time from October under tougher marketing rules unveiled by the financial regulator on Thursday. The Financial Conduct Authority (FCA) said "refer a friend" bonuses for crypto buyers would also be scrapped and that those promoting such assets would have to put in place clear risk warnings and ensure adverts were clear, fair and not misleading. The new crypto rules, which are similar to those imposed by the FCA last year to tackle advertising for high-risk investment in mainstream finance, come as Britain plans to regulate cryptoassets under a new financial services law this year.