Trade group says inconsistent and duplicative regulation is an aggravating factor.
SwapClear added five currencies from Asia Pacific and Latin America.
LSEG's interest rate derivatives venture had a record start to this year.
Pan-European exchange operator will continue to invest in London amid Brexit.
Each subsequent phase of the rollout pulls in more buy-side firms.
Three-quarters of asset managers invested in Sonia instruments last year.
US trading venues, firms and CCPs will continue to provide services in the UK after Brexit.
Volatile markets force a need for higher margin.
Eurex has also received regulatory approval to clear interest rate derivatives for U.S. persons.