My most recent landing at Norwich was a weather diversion - a line of thunderstorms materialised out of thin air and were pushing me towards the North Sea.
First of all I called up Norwich to tell them I was being pushed into their airspace by weather. They said "fine" and told me what their radar said the storms were doing. After a couple more minutes I decided I wasn't going to outrun the line of storms and told them I was landing at Norwich. "Cleared for straight in approach."
The only interesting bit was after landing: "turn right and contine with the marshaller". I'd never seen a marshaller before and although I had of course memorised all the signals in order to pass the exam that had been many years before. Fortunately I managed to guess what all the waving around of bats meant.