WARSAW, Feb 24 (Reuters) - Poland has delivered four Leopard tanks to Ukraine already and is prepared to deliver more quickly, Polish Prime Minister Mateusz Morawiecki said on Friday, as Western nations increase their support to Kyiv a year after Russia invaded the country. Poland said last month it aimed to get training time for Ukrainian soldiers on Leopard 2 tanks down to five weeks. Poland said last month it aimed to get training time for Ukrainian soldiers on Leopard 2 tanks down to five weeks