Standing at the bottom of the hill, I looked up at the climb ahead of me. It was September 2021 and my husband Michael, then 56, and I were on our way to watch our youngest daughter Lucy, then 22, graduate from the University of Lincoln. The ceremony took place at Lincoln Cathedral, at the top of Steep Hill, which meant parking at the bottom and walking up. We’d done the same three years earlier when our eldest, Laura, had graduated. Back then, I’d faced an almighty struggle. I huffed and puffed, sweating profusely, as I made my way forward. I had to stop for breaks and use the handrail to propel myself uphill. And by the time I reached the top, I was flustered and red-faced, and when I…