The Financial Conduct Authority has completed a public consultation on its proposals for creating a new category of sovereign-controlled firms seeking a listing.

It would mean relaxing a rule that companies float at least 25 percent of their shares, and British fund managers have expressed concerns about governance. London is competing with rival listing centres like New York for what would be the world's biggest IPO.

"There was a range of views on both sides of this issue," FCA Chief Executive Andrew Bailey told parliament's Treasury Select Committee on Wednesday.

"We are talking to all interested parties who responded to see how we can take those views into account and come up with something practical."

The focus is on whether "sensible adjustments" can be made, but no decision has been taken, Bailey said.

(Reporting by Huw Jones; Editing by Catherine Evans)