"A key input in the decision is how uncertainty unwinds going forward, and how that impacts on demand. We will be watching very closely how firms and households respond to Brexit developments," Tenreyro said in a question and answer session.

"We are talking about the coming months, or I am talking about the coming months, on the possibility of further stimulus," she added at the event hosted by the Resolution Foundation think tank.

(Reporting by William Schomberg, writing by David Milliken)