Water perfect but no luck on my first night of this trip!

Last night was looking hopeful especially as Sandy had told me earlier that he had seen 4 fish near the Cattle Drink and a 5lb fish jump in Crewel! I fished till 2.00am and the temperature had dropped to 6 deg. The water was clear and at a good level but I didn't get any offers or see any fish. With heavy showers this morning I'm hoping that the river remains clear for tonight!