When you stop to think about it (and I'm sure you do constantly) photosynthesis is a remarkable process.  I sat on the boardwalk round the hut yesterday afternoon watching fish rise to a sedge hatch and soaking up the welcome sun.  The surface of the Tarn was covered in what seemed to be little splatters which looked like rain drops falling on the water.  Strange, I thought.  The Sky was almost cloudless so rain was unlikely as a cause.  I started looking for a fly hatch and there were a few sedges emerging.  Their struggles off the surface were obvious so they were not the cause.  On closer examination I saw that these 'splatters' only occurred over the weed and were absent over the stony bottom areas.  It turned out that what I was seeing were thousands of tiny bubbles (and some larger ones) rising off the weed helping to oxygenate the water.  With this amount of oxygen being given off it's hardly surprising that the water in the Tarn looks so healthy and the fish are so fit.  We may mutter from time to time about the way that the weed interferes when fishing with a weighted line, but on the whole it's presence is entirely beneficial.

We have a marked contrast in the weather here this morning to the sun we enjoyed yesterday.  It's overcast and a bit drizzly with a stiff westerly breeze.  The local forecast is for a return to brighter conditions tomorrow.  We shall see.

Ian