BRUSSELLS, Belgium — Britain will overtake Germany and France to become the biggest country in the EU in 50 years’ time, according to population projections unveiled yesterday. A survey of demographic trends finds Britain’s positive birth rate contrasting strongly with most other large countries in Europe. The impact of population shrinkage, coupled with the ageing of key European societies, spells big problems for pensions, health and welfare systems across much of the union, says the report, published by Eurostat, the statistical service of the European commission. But Britain, it says, is likely to suffer less because of its strong population growth and the younger average age of British society. Immigration is singled out as the sole mitigating factor, seen as crucial to maintaining population growth. But the report says this probably will not be enough to reverse the trend of population decline in many countries. The survey predicts that Britain’s population by 2060 will increase by 25% from the current figure of just over 61 million to almost 77 million. Germany is the biggest country in the EU, with more than 82 million people, but it is likely to shed almost 12 million by 2060, […]