Suggestions of a 4000-plus Conservative majority in Norwich are way off beam. Our team there is forecasting a tight finish.Some will interpret that as trying to calm things down, and time will tell if he is right. The LibDems have been careful not to overplay their chances, and are relying on a "late surge". Second place for them would be a success.
The truth is that no one knows what is going to happen to the Labour vote, and that's why it's so difficult to predict. A low turnout means the Labour vote will have stayed at home. A higher turnout could mean that the Labour vote has transferred to other parties. Or it could mean that it has remained loyal.
On the basis that I am the world's worst predictor, if I was putting money on it I would be betting on a Tory majority of 1-2,000 on a turnout of under 50%.