British Prime Minister Boris Johnson and European Commission chief Ursula von der Leyen agreed on Wednesday to decide by Sunday whether their Brexit talks are worth continuing, Downing Street said, noting "very large gaps" still remain. "The PM and VDL agreed to further discussions over the next few days between their negotiating teams," a senior Number 10 source said. "The PM and VDL agreed that by Sunday a firm decision should be taken about the future of the talks." jit/phz/dl