What can you do in a single afternoon in London?

You are spoilt for choice so you must just pick a few locations and see what you can find. This particular afternoon started with a journey from Surbiton to Waterloo for a meet in Islington followed by a semi-planned wander back to the heart of the city.

The weather was kind, time was not. Afternoon turned to evening and the day was done.

What can you do in an afternoon in London? Not much but enough for another memory.