Tusk defends overhaul of Poland’s constitutional court despite protests

Prime minister says shake-up is vital to restore tribunal crippled by years of political disputes

Poland's prime minister, Donald Tusk, has vowed to see through a contested overhaul of the country's constitutional court, declaring that in certain matters, there can be no compromise".

In a prime-time television address on Saturday night, Tusk was defiant, despite overnight protests that saw riot police drafted to protect the court's building, saying the shake-up was vital to restore a tribunal crippled by years of political disputes.