LONDON (Reuters) - The London Stock Exchange on Thursday said it had appointed Anna Manz as chief financial officer from November, when the exchange hopes it will have obtained approval for its $27 billion takeover of data and analytics company Refinitiv.Manz, currently CFO and executive director of Johnson Matthey , succeeds David Warren, who said last year he would retire from the group.The LSE will know in October if the European Commission will approve its Refinitiv deal, and whether it will..