Car hasn't missed a beat up until this point. Taking mrs to work this morning, after about 20 mins the temperature sh*t itself and shot from the normal temperature straight into the red zone and started beeping to stop. So pulled up and then the anti pollution fault flashed on dash. Checked the radiator pipes and top one was hot and bottom was cold, fan was blowing cold hard onto the engine after turning off so I'm a little stumped, and didn't want to pay through the nose for inconclusive tests. Help would be appreciated haha.