Astragal is surely not the only one who feels a nervy tightening of the chest when they gaze upon Laurie Chetwood’s admirably eco-friendly Urban Oasis in London’s Clerkenwell Green. Day of the Triffids casts a long and ominous shadow over the project. And now, worryingly, the hydraulic tree seems to have uprooted and taken on a life of its own – and it’s heading right for the centre of British governmental power. That’s right, Astragal was most perturbed when he got to the Labour Party conference in Manchester to be greeted with the sight of the mechanical shrub skulking suspiciously about the place. Suddenly the Brown/Johnson leadership race seems to pale into insignificance. Do giant eco-friendly hydraulic trees have a policy on the NHS one wonders?