Standing on the peak of Shishapangma, I took in the view, feeling the bitter cold on my face. Then I called home and told Mum of what I’d achieved, and where I planned to go next. ‘I’ve done it!’ I shouted into the phone. ‘And I’m OK.’ The line was crackling, but I could just make out her laughter. ‘Get home safe, son,’ she said. ‘I love you.’