LONDON (Reuters) – Child income poverty rates in the United Kingdom were the highest among the world’s richest countries, a report by U.N. children’s agency UNICEF said, ranking bottom of the table for changes in those rates in the past decade. The UNICEF report, published on Wednesday, looked at relatively well-off countries to assess the rate of child income poverty combined with child poverty reduction rates. Britain ranked 37th out of the 39 nations in the European Union (EU) and the Organisation for Economic Co-operation and Development (OECD) based on income poverty rate for children and…