After start up in the morning and after work I've noticed that the car rev's slightly higher up to 1300 - 1500 for about 5 - 10 seconds then drops down to normal idle around 800 rpm. Strange because I've felt no problem's with the drive of the car or problem's on idle when stopped. If i start it up after it after been driven the rpm's always normal and never high as highlighted. Had it checked out a few week's ago with VCD when it happened now and again and no problem's showed up. I'm thinking whether it's to do with the temperature at the minute, the baking sun! Car is due for a service in August so thinking to wait until then see how it goes.