The acquisition of Refinitiv was completed in January this year.
Political relations between the UK and the Biden administration will be key in the coming months.
Survey backed a ban on payment for order flow in the US markets.
US SEFs have between 20% and 40% of European derivatives trading.
The UK has granted equivalence to the EU in some areas but the EU has not done likewise.
The UK government has agreed equivalence with Switzerland.
Trading in Swiss equities on UK exchanges can now resume.
The industry is eager to see structured regulatory cooperation on financial services.
Switzerland's stock exchanges have been granted equivalence by the UK after Brexit.