Multinational companies should report how much tax they pay in each country, says Stephen Timms, the financial secretary to the Treasury. Timms is to discuss his plans at a G20 meeting being held this week in Berlin. He said: 'I want to make sure we address the concerns in developing countries.' It is claimed by anti-avoidance tax campaigners that developing countries and non-governmental groups stand to gain from this proposal. For example, it is said international mining firms have secured secret tax deals in the past which has led to developing countries losing out on vast amounts of money. Country-by-country reporting - which is currently not practised - will be a 'key mechanism' for developing countries David McNair, senior economic adviser at Christian Aid told The Guardian. He said those countries will gain 'information they need to identify companies that dodge tax and to ensure they have enough money to invest in health and education'. Timms announced his new plans to combat tax evasion and avoidance while he signed a double tax-sharing agreement with the Cayman Islands. He said: 'It has been a closed door until now.'