"We're not going to be drawn on any particular option for strengthening the balance sheet. We're taking our time, considering carefully," CFO Stephen Daintith told reporters on a call on Thursday, soon after he announced he had resigned from the company but would remain for a transition period.

"Right now we think we have a good level of liquidity, we've got a good plan."

Asked about potential government support for the company, after media speculation that the Rolls-Royce could need state-help, Rolls-Royce CEO Warren East said: "Probably the most important thing that government can do is help get people flying again."

(Reporting by Sarah Young, Editing by Paul Sandle)