Negotiators in Paris are battling to persuade holdout nations to sign up to a global deal on corporate taxation this week as they become increasingly concerned that the compromises needed to get countries on board will water down the final agreement.

China, India, eastern European countries and developing nations have all raised objections to the deal struck by the G7 group of leading economies this month. The talks at the OECD are seeking to find carve-outs to bring them on board.

Tax havens and investment hubs such as Ireland, Switzerland and Barbados are widely expected to refuse to sign up to the deal, according to some of those involved. The details of the proposals will be discussed by finance ministers from the G20 group of countries at a summit in Venice next month.