A spat between European and British regulators over where shares should trade in the event of a no-deal Brexit has flared up after the UK Financial Conduct Authority accused its Paris-based counterpart of risking disruption to liquid markets.

The European Securities and Markets Authority on May 29 backed down from plans to force EU-based investors to trade 14 of the biggest FTSE 100 stocks in the bloc if the UK leaves without a deal on October 31.