London: fire, boat, arrows, figs.

While Cara, Carolyn and Pia have been in, on and around the Yukon River, thinking about water and ice, there has been a fire in London. The reeds in the Middlesex filter beds - where we filmed Cara just a few weeks ago - have gone.

Not being able to canoe with the others, I made a little boat and floated it off into the Lea. More detritus to add to the river's payload.

Orange arrows have appeared near the river. No idea what they're for.

The transient scent of figs as you walk by a fig tree is one of the delights of the riverside. It's interesting to remind yourself of how it got there though. The seeds of fig trees survive their transit through the human digestive system, and wash up on polluted river banks where they germinate and grow.