This morning was another early start, with a long motor from Portsmouth to our start point.

The current and conditions are still in our favour and I was able to make quick progress on the swim.

The tides are beginning to tail off now, though, as we move towards neaps and are rapidly losing the boost we had from the Isle of Wight. We are ahead by around 4 miles (7km) compared to where we predicted that I would be on day 34, so we have a buffer at least.

Knowing the UK, I wouldn't be surprised if we lose another day to bad weather in these last two weeks too.

When I got out, just over two hours later, I wiped my face in one of the waiting towels. To my disgust, I saw that I'd left a brown smudge on the white, fluffy side. My speedo swimming trunks had also gone from a deep blue to a muddy colour.

There has been a slow change in the water over the past few days, so slow that I had barely noticed it until it had dirtied my face.

The water has gone from a transparent blue with visibility of ten meters off the coast of Cornwall, to a murky, chalky green colour with limited visibility in Sussex.

There is little life to see near the surface.

I haven't seen a single dolphin or fish for days. There aren't even any jellyfish.

As the English Channel gets narrower, the coast is also becoming increasingly urban and there is much more shipping traffic to contend with.

This is the busiest shipping lane in the world by tonnage - our biggest threat now is not from jellyfish, but from being run over.

9.37 miles (15.08 km) - Total 238.2 miles (383.37 km)