On the cycle home tonight, and after swimming it now is distinctly night, had to pass under this fancy machine that becomes a mobile gantry under bridges, for inspecting and carrying out various works. Spoke to the workers before they gaily stepped over the side, and they were checking some strain gauges that are fitted about the bridge - probably for monitoring its condition, and the various loads put on the bridge by the weather and traffic.

I only had to duck slightly.