Ford Mondeo V6 2000, 2.5 Petrol, Manual-starting problems?

My car won't start first thing in morning. It turns over fast enough and tries to fire but it won't. If I leave it for 10 minutes and try again it starts first time. This was only happening frequently but now it happens every morning. Once it starts it is ok for the rest of the day. Can anyone help me with this problem. Thanks