The Polish prime minister has boasted Poles will be richer than Britons by next year because “it’s better to be in the EU”.

Donald Tusk, the former president of the European Council, claimed forecasts show Poland is on track to have a higher GDP per capita than the UK by 2025.

Romania, with an average annual growth of 3.8 per cent and Hungary with 3 per cent, could also overtake the UK by 2040 if forecasts are accurate.