By David Humphries aged 48 and ¾   I often read and see with great interest (and with more than a tad of jealousy), the various exploits of the host of climbers both young and mature that gallivant around the northern and southern hemisphere,  exploring & climbing some of the world’s oldest and tallest tree specimens. The majority of my own humble climbing career took place in and around London during the 1990’s when we were still battling both the tree and the climbi