It’s the last cool morning before the most recent heatwave settled over the UK. It’s grey and a little close. My lodgings sit on the edge of Bristol city centre, where the Luftwaffe’s best efforts, then de-industrialisation and the demise of empire, mark the urban fabric. That manifests as past-its-best post-war concrete offices, impossibly tidy new builds, crumbling red-brick remnants, and scrubby plots of no-build.