I found myself near London Bridge after an appointment at Guy's Hospital early this morning, a meeting with a specialist doctor which had me thinking a lot about the energy flows through and out of my body. Cycling out to the middle of London Bridge involved ducking and weaving through throngs of tourists and families who, despite the grey and blustery weather, were determinedly taking group photos and pointing at London landmarks. I had to hold my laptop with one hand and orient the antenna with the other, as gusts of wind wobbled both laptop and antenna dangerously close to the edge of the bridge's railing. Passing by my ground station and curiously observing my antenna, a young boy said 'Dad, what is she doing' and was answered with a flat 'dunno.. tracking something'.